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 a68350659c64c329c237c5665f841ff7f5bd341e..cac11c4b1a92b40a818bd0a8db2ba513d49bafa6 100644
--- a/cc/scheduler_state_machine.h
+++ b/cc/scheduler_state_machine.h
@@ -61,6 +61,7 @@ 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,
@@ -86,6 +87,10 @@ public:
     // or the screen being damaged and simply needing redisplay.
     void setNeedsRedraw();
 
+    // Indicates that a redraw is required because we are currently rendererd
+    // with a low resolution or checkerboarded tile.
+    void setNeedsRedrawOnVisibleTextureUpload();
+
     // As setNeedsRedraw(), but ensures the draw will definitely happen even if
     // we are not visible.
     void setNeedsForcedRedraw();
@@ -149,8 +154,10 @@ protected:
     bool shouldDraw() const;
     bool shouldAttemptTreeActivation() const;
     bool shouldAcquireLayerTexturesForMainThread() const;
+    bool shouldCheckForNewTextures() const;
     bool hasDrawnThisFrame() const;
     bool hasAttemptedTreeActivationThisFrame() const;
+    bool hasCheckedForNewTexturesThisFrame() const;
 
     const SchedulerSettings* const m_settings;
 
@@ -159,9 +166,11 @@ protected:
     int m_currentFrameNumber;
     int m_lastFrameNumberWhereDrawWasCalled;
     int m_lastFrameNumberWhereTreeActivationAttempted;
+    int m_lastFrameNumberWhereCheckForNewTexturesCalled;
     int m_consecutiveFailedDraws;
     int m_maximumNumberOfFailedDrawsBeforeDrawIsForced;
     bool m_needsRedraw;
+    bool m_needsRedrawOnVisibleTextureUpload;
     bool m_needsForcedRedraw;
     bool m_needsForcedRedrawAfterNextCommit;
     bool m_needsCommit;