Bug 1204875 - Hide Tabs Panel thumbnail height change behind nightly flag; r=mfinkle

--HG--
extra : commitid : HLTX0sA19cF
extra : rebase_source : bbf0b9d641cacfe70a40eb1c05397d24e7515e2f
extra : amend_source : 1783c53c38e919eb3673028c4f27a3324328d607

mobile/android/base/ThumbnailHelper.java

@@ -32,7 +32,7 @@ public final class ThumbnailHelper {
 
     public static final float TABS_PANEL_THUMBNAIL_ASPECT_RATIO = 0.8333333f;
     public static final float TOP_SITES_THUMBNAIL_ASPECT_RATIO = 0.571428571f;  // this is a 4:7 ratio (as per UX decision)
-    private static final float THUMBNAIL_ASPECT_RATIO;
+    public static final float THUMBNAIL_ASPECT_RATIO;
 
     static {
       // As we only want to generate one thumbnail for each tab, we calculate the

mobile/android/base/tabs/TabsPanelThumbnailView.java

@@ -5,6 +5,7 @@
 
 package org.mozilla.gecko.tabs;
 
+import org.mozilla.gecko.AppConstants;
 import org.mozilla.gecko.R;
 import org.mozilla.gecko.ThumbnailHelper;
 import org.mozilla.gecko.widget.CropImageView;
@@ -34,7 +35,11 @@ public class TabsPanelThumbnailView extends CropImageView {
 
     @Override
     protected float getAspectRatio() {
-        return ThumbnailHelper.TABS_PANEL_THUMBNAIL_ASPECT_RATIO;
+        if (AppConstants.NIGHTLY_BUILD) {
+            return ThumbnailHelper.TABS_PANEL_THUMBNAIL_ASPECT_RATIO;
+        } else {
+            return ThumbnailHelper.TOP_SITES_THUMBNAIL_ASPECT_RATIO;
+        }
     }
 
     @Override