Bug 886123 - Handle locale changes with BroadcastReceiver instead of getLastCustomNonConfigurationInstance(). r=sriram

mobile/android/base/GeckoApp.java

@@ -1203,9 +1203,12 @@ abstract public class GeckoApp
         Tabs.getInstance().attachToActivity(this);
         Favicons.getInstance().attachToContext(this);
 
-        // Check to see if the activity is restarted after configuration change.
-        if (getLastCustomNonConfigurationInstance() != null) {
-            // Restart the application as a safe way to handle the configuration change.
+        // When we detect a locale change, we need to restart Gecko, which
+        // actually means restarting the entire application. This logic should
+        // actually be handled elsewhere since GeckoApp may not be alive to
+        // handle this event if "Don't keep activities" is enabled (filed as
+        // bug 889082).
+        if (((GeckoApplication)getApplication()).needsRestart()) {
             doRestart();
             System.exit(0);
             return;
@@ -2084,13 +2087,6 @@ abstract public class GeckoApp
         }
     }
 
-    @Override
-    public Object onRetainCustomNonConfigurationInstance() {
-        // Send a non-null value so that we can restart the application, 
-        // when activity restarts due to configuration change.
-        return Boolean.TRUE;
-    } 
-
     public String getContentProcessName() {
         return AppConstants.MOZ_CHILD_PROCESS_NAME;
     }

mobile/android/base/GeckoApplication.java

@@ -12,12 +12,17 @@ import org.mozilla.gecko.util.HardwareUtils;
 import org.mozilla.gecko.util.ThreadUtils;
 
 import android.app.Application;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
 
 public class GeckoApplication extends Application {
 
     private boolean mInited;
     private boolean mInBackground;
     private boolean mPausedGecko;
+    private boolean mNeedsRestart;
 
     private LightweightTheme mLightweightTheme;
 
@@ -38,6 +43,14 @@ public class GeckoApplication extends Application {
         GeckoNetworkManager.getInstance().init(getApplicationContext());
         MemoryMonitor.getInstance().init(getApplicationContext());
 
+        BroadcastReceiver receiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                mNeedsRestart = true;
+            }
+        };
+        registerReceiver(receiver, new IntentFilter(Intent.ACTION_LOCALE_CHANGED));
+
         mInited = true;
     }
 
@@ -77,6 +90,10 @@ public class GeckoApplication extends Application {
         mInBackground = false;
     }
 
+    protected boolean needsRestart() {
+        return mNeedsRestart;
+    }
+
     @Override
     public void onCreate() {
         HardwareUtils.init(getApplicationContext());