cc: Redraw incomplete frames when new texture uploads finish

cc/scheduler_state_machine.h

Index: cc/scheduler_state_machine.h
diff --git a/cc/scheduler_state_machine.h b/cc/scheduler_state_machine.h
index 5959bff343e4c17d33026f96eba7c771c79626c4..b2c97f4e349e050ad4765f4c2931adf1429e618e 100644
--- a/cc/scheduler_state_machine.h
+++ b/cc/scheduler_state_machine.h
@@ -60,6 +60,7 @@ public:
         ACTION_NONE,
         ACTION_BEGIN_FRAME,
         ACTION_COMMIT,
+        ACTION_CHECK_FOR_NEW_TEXTURES,
         ACTION_ACTIVATE_PENDING_TREE_IF_NEEDED,
         ACTION_DRAW_IF_POSSIBLE,
         ACTION_DRAW_FORCED,
@@ -89,6 +90,10 @@ public:
     // we are not visible.
     void setNeedsForcedRedraw();
 
+    // Indicates that a redraw is required because we are currently rendererd
+    // with a low resolution or checkerboarded tile.
+    void didSwapUseIncompleteTexture();
+
     // Indicates whether ACTION_DRAW_IF_POSSIBLE drew to the screen or not.
     void didDrawIfPossibleCompleted(bool success);
 
@@ -148,8 +153,10 @@ protected:
     bool shouldDraw() const;
     bool shouldAttemptTreeActivation() const;
     bool shouldAcquireLayerTexturesForMainThread() const;
+    bool shouldCheckForCompletedTextures() const;
     bool hasDrawnThisFrame() const;
     bool hasAttemptedTreeActivationThisFrame() const;
+    bool hasCheckedForCompletedTexturesThisFrame() const;
 
     const SchedulerSettings m_settings;
 
@@ -158,9 +165,11 @@ protected:
     int m_currentFrameNumber;
     int m_lastFrameNumberWhereDrawWasCalled;
     int m_lastFrameNumberWhereTreeActivationAttempted;
+    int m_lastFrameNumberWhereCheckForCompletedTexturesCalled;
     int m_consecutiveFailedDraws;
     int m_maximumNumberOfFailedDrawsBeforeDrawIsForced;
     bool m_needsRedraw;
+    bool m_swapUsedIncompleteTexture;
     bool m_needsForcedRedraw;
     bool m_needsForcedRedrawAfterNextCommit;
     bool m_needsCommit;