cc: Redraw incomplete frames when new texture uploads finish

cc/layer_tree_host_impl.h

Index: cc/layer_tree_host_impl.h
diff --git a/cc/layer_tree_host_impl.h b/cc/layer_tree_host_impl.h
index d3a5858815fbd631fe4c87adebe608f8e224303a..bba524fba714aac27be9b9d07b24a69fa6b56484 100644
--- a/cc/layer_tree_host_impl.h
+++ b/cc/layer_tree_host_impl.h
@@ -47,6 +47,7 @@ public:
     virtual void onCanDrawStateChanged(bool canDraw) = 0;
     virtual void onHasPendingTreeStateChanged(bool hasPendingTree) = 0;
     virtual void setNeedsRedrawOnImplThread() = 0;
+    virtual void setNeedsRedrawOnVisibleTextureUploadOnImplThread() = 0;
     virtual void setNeedsCommitOnImplThread() = 0;
     virtual void setNeedsManageTilesOnImplThread() = 0;
     virtual void postAnimationEventsToMainThreadOnImplThread(scoped_ptr<AnimationEventsVector>, base::Time wallClockTime) = 0;
@@ -155,7 +156,8 @@ public:
     LayerTreeImpl* pendingTree() { return m_pendingTree.get(); }
     const LayerTreeImpl* pendingTree() const { return m_pendingTree.get(); }
     void createPendingTree();
-    void checkForCompletedSetPixels();
+    // returns true if newly completed pixels are visible and high resolution
+    bool checkForCompletedSetPixels();
     virtual void activatePendingTreeIfNeeded();
 
     // Shortcuts to layers on the active tree.