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 eda537fde068a84d5893fbe758714f6d1084abdf..f7ed4eecbb15bfd5545f20d0c99ddf836dc90972 100644
--- a/cc/scheduler_state_machine.h
+++ b/cc/scheduler_state_machine.h
@@ -63,6 +63,7 @@ public:
         ACTION_ACTIVATE_PENDING_TREE_IF_NEEDED,
         ACTION_DRAW_IF_POSSIBLE,
         ACTION_DRAW_FORCED,
+        ACTION_CHECK_FOR_NEW_VISIBLE_TEXTURES,
         ACTION_BEGIN_OUTPUT_SURFACE_RECREATION,
         ACTION_ACQUIRE_LAYER_TEXTURES_FOR_MAIN_THREAD,
     };
@@ -85,6 +86,10 @@ 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();
@@ -148,8 +153,10 @@ protected:
     bool shouldDraw() const;
     bool shouldAttemptTreeActivation() const;
     bool shouldAcquireLayerTexturesForMainThread() const;
+    bool shouldAttemptRedrawOnVisibleTextureUpload() const;
     bool hasDrawnThisFrame() const;
     bool hasAttemptedTreeActivationThisFrame() const;
+    bool hasAttemptedRedrawOnVisibleTextureUploadThisFrame() const;
 
     const LayerTreeSettings& m_layerTreeSettings;
 
@@ -158,9 +165,11 @@ protected:
     int m_currentFrameNumber;
     int m_lastFrameNumberWhereDrawWasCalled;
     int m_lastFrameNumberWhereTreeActivationAttempted;
+    int m_lastFrameNumberWhereRedrawOnVisibleTextureUploadAttempted;
     int m_consecutiveFailedDraws;
     int m_maximumNumberOfFailedDrawsBeforeDrawIsForced;
     bool m_needsRedraw;
+    bool m_needsRedrawOnVisibleTextureUpload;
     bool m_needsForcedRedraw;
     bool m_needsForcedRedrawAfterNextCommit;
     bool m_needsCommit;