Revert "Added Developer Options settings for multi-window mode."

This reverts commit 4c9d667bc2.

Bug: 24462906
Bug: 19494313
Change-Id: Iaa698868d8896a09c377b5da03c20b2a0b72d253

res/values/strings.xml

@@ -5120,14 +5120,6 @@
     <!-- UI debug setting: simulate secondary display devices using overlays [CHAR LIMIT=25] -->
     <string name="overlay_display_devices_title">Simulate secondary displays</string>
 
-    <!-- UI debug setting: enable/disable debug multi-window ui [CHAR LIMIT=25] -->
-    <string name="enable_multi_window">Multi-window mode</string>
-    <!-- setting Checkbox summary whether to enable debug multi-window ui [CHAR_LIMIT=50] -->
-    <string name="enable_multi_window_summary">Multiple activities on screen at the same time.</string>
-    <string name="confirm_enable_multi_window_title">Enable multi-window mode?</string>
-    <!-- Warning dialog message to confirm user wishes to enable experimental multi-window mode feature -->
-    <string name="confirm_enable_multi_window_text">WARNING: This is a highly experimental feature that allows multiple activities on-screen at the same time through the Recent apps UI. Some apps may crash or not function correctly when used with this feature.</string>
-
     <!-- Preference category for application debugging development settings. [CHAR LIMIT=25] -->
     <string name="debug_applications_category">Apps</string>
 

res/xml/development_prefs.xml

@@ -226,11 +226,6 @@
             android:entries="@array/overlay_display_devices_entries"
             android:entryValues="@array/overlay_display_devices_values" />
 
-        <SwitchPreference
-            android:key="enable_multi_window"
-            android:title="@string/enable_multi_window"
-            android:summary="@string/enable_multi_window_summary"/>
-
     </PreferenceCategory>
 
     <PreferenceCategory android:key="debug_hw_drawing_category"

src/com/android/settings/DevelopmentSettings.java

@@ -145,7 +145,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
     private static final String TRANSITION_ANIMATION_SCALE_KEY = "transition_animation_scale";
     private static final String ANIMATOR_DURATION_SCALE_KEY = "animator_duration_scale";
     private static final String OVERLAY_DISPLAY_DEVICES_KEY = "overlay_display_devices";
-    private static final String ENABLE_MULTI_WINDOW_KEY = "enable_multi_window";
     private static final String DEBUG_DEBUGGING_CATEGORY_KEY = "debug_debugging_category";
     private static final String SELECT_LOGD_SIZE_KEY = "select_logd_size";
     private static final String SELECT_LOGD_SIZE_PROPERTY = "persist.logd.size";
@@ -187,7 +186,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
 
     private static final int[] MOCK_LOCATION_APP_OPS = new int[] {AppOpsManager.OP_MOCK_LOCATION};
 
-    private static final String MULTI_WINDOW_SYSTEM_PROPERTY = "persist.sys.debug.multi_window";
     private IWindowManager mWindowManager;
     private IBackupManager mBackupManager;
     private DevicePolicyManager mDpm;
@@ -231,7 +229,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
     private SwitchPreference mShowTouches;
     private SwitchPreference mShowScreenUpdates;
     private SwitchPreference mDisableOverlays;
-    private SwitchPreference mEnableMultiWindow;
     private SwitchPreference mShowCpuUsage;
     private SwitchPreference mForceHardwareUi;
     private SwitchPreference mForceMsaa;
@@ -384,18 +381,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
         mTransitionAnimationScale = addListPreference(TRANSITION_ANIMATION_SCALE_KEY);
         mAnimatorDurationScale = addListPreference(ANIMATOR_DURATION_SCALE_KEY);
         mOverlayDisplayDevices = addListPreference(OVERLAY_DISPLAY_DEVICES_KEY);
-        mEnableMultiWindow = findAndInitSwitchPref(ENABLE_MULTI_WINDOW_KEY);
-        if (!showEnableMultiWindowPreference()) {
-            final PreferenceGroup drawingGroup =
-                    (PreferenceGroup)findPreference("debug_drawing_category");
-            if (drawingGroup != null) {
-                drawingGroup.removePreference(mEnableMultiWindow);
-            } else {
-                mEnableMultiWindow.setEnabled(false);
-            }
-            removePreference(mEnableMultiWindow);
-            mEnableMultiWindow = null;
-        }
         mOpenGLTraces = addListPreference(OPENGL_TRACES_KEY);
         mSimulateColorSpace = addListPreference(SIMULATE_COLOR_SPACE);
         mUSBAudio = findAndInitSwitchPref(USB_AUDIO_KEY);
@@ -636,10 +621,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
         updateDebugLayoutOptions();
         updateAnimationScaleOptions();
         updateOverlayDisplayDevicesOptions();
-        if (mEnableMultiWindow != null) {
-            updateSwitchPreference(mEnableMultiWindow,
-                    SystemProperties.getBoolean(MULTI_WINDOW_SYSTEM_PROPERTY, false));
-        }
         updateOpenGLTracesOptions();
         updateImmediatelyDestroyActivitiesOptions();
         updateAppProcessLimitOptions();
@@ -871,15 +852,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
         return !SystemProperties.get(PERSISTENT_DATA_BLOCK_PROP).equals("");
     }
 
-    private static boolean showEnableMultiWindowPreference() {
-        return !"user".equals(Build.TYPE);
-    }
-
-    private void setEnableMultiWindow(boolean value) {
-        SystemProperties.set(MULTI_WINDOW_SYSTEM_PROPERTY, String.valueOf(value));
-        pokeSystemProperties();
-    }
-
     private void updateBugreportOptions() {
         final ComponentName bugreportStorageProviderComponentName =
                 new ComponentName("com.android.shell",
@@ -1543,24 +1515,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
                 .show();
     }
 
-    private void confirmEnableMultiWindowMode() {
-        DialogInterface.OnClickListener onConfirmListener = new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialog, int which) {
-                setEnableMultiWindow((which == DialogInterface.BUTTON_POSITIVE) ? true : false);
-                updateAllOptions();
-            }
-        };
-
-        new AlertDialog.Builder(getActivity())
-                .setTitle(R.string.confirm_enable_multi_window_title)
-                .setMessage(R.string.confirm_enable_multi_window_text)
-                .setPositiveButton(R.string.enable_text, onConfirmListener)
-                .setNegativeButton(android.R.string.cancel, onConfirmListener)
-                .create()
-                .show();
-    }
-
     @Override
     public void onSwitchChanged(Switch switchView, boolean isChecked) {
         if (switchView != mSwitchBar.getSwitch()) {
@@ -1701,12 +1655,6 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
             writeShowUpdatesOption();
         } else if (preference == mDisableOverlays) {
             writeDisableOverlaysOption();
-        } else if (preference == mEnableMultiWindow) {
-            if (mEnableMultiWindow.isChecked()) {
-                confirmEnableMultiWindowMode();
-            } else {
-                setEnableMultiWindow(false);
-            }
         } else if (preference == mShowCpuUsage) {
             writeCpuUsageOptions();
         } else if (preference == mImmediatelyDestroyActivities) {