Add an experimental webview setting to dev options.

Bug:12492817

Add an experimental webview setting to developer options to enable
data reduction proxy.

Change-Id: I6e0931b39c8dd129622129589ae67352c8396cd2

res/values/strings.xml

@@ -4538,6 +4538,12 @@
     <string name="show_all_anrs_summary">Show App Not Responding dialog
         for background apps</string>
 
+    <!-- UI debug setting: webview data reduction proxy [CHAR LIMIT=25] -->
+    <string name="webview_data_reduction_proxy">Reduce WebView Network Usage</string>
+    <!-- UI debug setting: webview data reduction proxy summary [CHAR LIMIT=150] -->
+    <string name="webview_data_reduction_proxy_summary">Reduce network usage by
+        proxying WebView connections through Google compression servers (Experimental)</string>
+
     <!-- Activity title for network data usage summary. [CHAR LIMIT=25] -->
     <string name="data_usage_summary_title">Data usage</string>
     <!-- Title for option to pick visible time range from a list available usage periods. [CHAR LIMIT=25] -->

res/xml/development_prefs.xml

@@ -286,6 +286,10 @@
             android:title="@string/show_all_anrs"
             android:summary="@string/show_all_anrs_summary"/>
 
+        <CheckBoxPreference
+            android:key="webview_data_reduction_proxy"
+            android:title="@string/webview_data_reduction_proxy"
+            android:summary="@string/webview_data_reduction_proxy_summary"/>
      </PreferenceCategory>
 
 </PreferenceScreen>

src/com/android/settings/DevelopmentSettings.java

@@ -60,6 +60,7 @@ import android.view.HardwareRenderer;
 import android.view.IWindowManager;
 import android.view.View;
 import android.view.accessibility.AccessibilityManager;
+import android.webkit.WebView;
 import android.widget.CompoundButton;
 import android.widget.Switch;
 import android.widget.TextView;
@@ -144,6 +145,8 @@ public class DevelopmentSettings extends RestrictedSettingsFragment
 
     private static final String SHOW_ALL_ANRS_KEY = "show_all_anrs";
 
+    private static final String WEBVIEW_DATA_REDUCTION_PROXY_KEY = "webview_data_reduction_proxy";
+
     private static final String PROCESS_STATS = "proc_stats";
 
     private static final String TAG_CONFIRM_ENFORCE = "confirm_enforce";
@@ -209,6 +212,8 @@ public class DevelopmentSettings extends RestrictedSettingsFragment
 
     private CheckBoxPreference mShowAllANRs;
 
+    private CheckBoxPreference mWebViewDataReductionProxy;
+
     private PreferenceScreen mProcessStats;
 
     private final ArrayList<Preference> mAllPrefs = new ArrayList<Preference>();
@@ -340,6 +345,8 @@ public class DevelopmentSettings extends RestrictedSettingsFragment
 
         mProcessStats = (PreferenceScreen) findPreference(PROCESS_STATS);
         mAllPrefs.add(mProcessStats);
+
+        mWebViewDataReductionProxy = findAndInitCheckboxPref(WEBVIEW_DATA_REDUCTION_PROXY_KEY);
     }
 
     private ListPreference addListPreference(String prefKey) {
@@ -515,6 +522,7 @@ public class DevelopmentSettings extends RestrictedSettingsFragment
         updateImmediatelyDestroyActivitiesOptions();
         updateAppProcessLimitOptions();
         updateShowAllANRsOptions();
+        updateWebViewDataReductionProxyOptions();
         updateVerifyAppsOverUsbOptions();
         updateBugreportOptions();
         updateForceRtlOptions();
@@ -1193,6 +1201,20 @@ public class DevelopmentSettings extends RestrictedSettingsFragment
             getActivity().getContentResolver(), Settings.Secure.ANR_SHOW_BACKGROUND, 0) != 0);
     }
 
+    private void writeWebViewDataReductionProxyOptions() {
+        Settings.Secure.putInt(getActivity().getContentResolver(),
+                Settings.Secure.WEBVIEW_DATA_REDUCTION_PROXY,
+                mWebViewDataReductionProxy.isChecked() ? 1 : 0);
+        Intent intent = new Intent(WebView.DATA_REDUCTION_PROXY_SETTING_CHANGED);
+        getActivity().sendBroadcast(intent);
+    }
+
+    private void updateWebViewDataReductionProxyOptions() {
+        updateCheckBox(mWebViewDataReductionProxy, Settings.Secure.getInt(
+            getActivity().getContentResolver(),
+            Settings.Secure.WEBVIEW_DATA_REDUCTION_PROXY, 0) != 0);
+    }
+
     @Override
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
         if (buttonView == mEnabledSwitch) {
@@ -1309,6 +1331,8 @@ public class DevelopmentSettings extends RestrictedSettingsFragment
             writeImmediatelyDestroyActivitiesOptions();
         } else if (preference == mShowAllANRs) {
             writeShowAllANRsOptions();
+        } else if (preference == mWebViewDataReductionProxy) {
+            writeWebViewDataReductionProxyOptions();
         } else if (preference == mForceHardwareUi) {
             writeHardwareUiOptions();
         } else if (preference == mForceMsaa) {