Bug 1087673 - Enable tab history menu haptic feedback. r=bnicholson

mobile/android/base/BrowserApp.java

@@ -529,6 +529,7 @@ public class BrowserApp extends GeckoApp
                     public void run() {
                         final TabHistoryFragment fragment = TabHistoryFragment.newInstance(historyPageList, toIndex);
                         final FragmentManager fragmentManager = getSupportFragmentManager();
+                        GeckoAppShell.vibrateOnHapticFeedbackEnabled(getResources().getInteger(R.integer.long_press_vibrate_msec));
                         fragment.show(R.id.tab_history_panel, fragmentManager.beginTransaction(), TAB_HISTORY_FRAGMENT_TAG);
                     }
                 });

mobile/android/base/GeckoAppShell.java

@@ -1415,6 +1415,13 @@ public class GeckoAppShell
         return (Vibrator) layerView.getContext().getSystemService(Context.VIBRATOR_SERVICE);
     }
 
+    // Vibrate only if haptic feedback is enabled.
+    public static void vibrateOnHapticFeedbackEnabled(long milliseconds) {
+        if (Settings.System.getInt(getContext().getContentResolver(), Settings.System.HAPTIC_FEEDBACK_ENABLED, 0) > 0) {
+            vibrate(milliseconds);
+        }
+    }
+
     @WrapElementForJNI(stubName = "Vibrate1")
     public static void vibrate(long milliseconds) {
         sVibrationEndTime = System.nanoTime() + milliseconds * 1000000;

mobile/android/base/resources/values/integers.xml

@@ -8,5 +8,6 @@
     <integer name="number_of_top_sites">6</integer>
     <integer name="number_of_top_sites_cols">2</integer>
     <integer name="max_icon_grid_columns">4</integer>
+    <integer name="long_press_vibrate_msec">100</integer>
 
 </resources>