Merge "Do not enable bandwidth reduction settings if key is not available"

src/com/android/settings/DevelopmentSettings.java

@@ -358,6 +358,10 @@ public class DevelopmentSettings extends SettingsPreferenceFragment
         mAllPrefs.add(mProcessStats);
 
         mWebViewDataReductionProxy = findAndInitCheckboxPref(WEBVIEW_DATA_REDUCTION_PROXY_KEY);
+        String key = Settings.Global.getString(getActivity().getContentResolver(),
+                Settings.Global.WEBVIEW_DATA_REDUCTION_PROXY_KEY);
+        // Make it not selectable if the key is not available for some reason.
+        mWebViewDataReductionProxy.setSelectable(key != null && !key.isEmpty());
     }
 
     private ListPreference addListPreference(String prefKey) {