Bug 736125 - Fix Java 7 compile warnings. r=sriram

mobile/android/base/GeckoApp.java

@@ -1321,7 +1321,7 @@ abstract public class GeckoApp
                 // want to load the image straight away. If tab is still
                 // loading, we only load the favicon once the page's content
                 // is fully loaded (see handleContentLoaded()).
-                if (tab.getState() != tab.STATE_LOADING) {
+                if (tab.getState() != Tab.STATE_LOADING) {
                     mMainHandler.post(new Runnable() {
                         public void run() {
                             loadFavicon(tab);

mobile/android/base/TabsTray.java

@@ -87,9 +87,8 @@ public class TabsTray extends Activity implements Tabs.OnTabsChangedListener {
         sPreferredHeight = (int) (0.67 * metrics.heightPixels);
         sMaxHeight = (int) (sPreferredHeight + (0.33 * sListItemHeight));
 
-        Tabs tabs = Tabs.getInstance();
-        tabs.registerOnTabsChangedListener(this);
-        tabs.refreshThumbnails();
+        Tabs.registerOnTabsChangedListener(this);
+        Tabs.getInstance().refreshThumbnails();
         onTabChanged(null, null);
 
         // If Sync is set up, query the database for remote clients.
@@ -114,7 +113,7 @@ public class TabsTray extends Activity implements Tabs.OnTabsChangedListener {
     @Override
     public void onDestroy() {
         super.onDestroy();
-        Tabs.getInstance().unregisterOnTabsChangedListener(this);
+        Tabs.unregisterOnTabsChangedListener(this);
     }
 
     public void onTabChanged(Tab tab, Tabs.TabEvents msg) {

mobile/android/base/gfx/LayerController.java

@@ -142,14 +142,13 @@ public class LayerController implements Tabs.OnTabsChangedListener {
         mView = new LayerView(context, this);
         mCheckerboardShouldShowChecks = true;
 
-        Tabs.getInstance().registerOnTabsChangedListener(this);
+        Tabs.registerOnTabsChangedListener(this);
 
-        ViewConfiguration vc = ViewConfiguration.get(mContext); 
-        mTimeout = vc.getLongPressTimeout();
+        mTimeout = ViewConfiguration.getLongPressTimeout();
     }
 
     public void onDestroy() {
-        Tabs.getInstance().unregisterOnTabsChangedListener(this);
+        Tabs.unregisterOnTabsChangedListener(this);
     }
 
     public void setRoot(Layer layer) { mRootLayer = layer; }