cc: Split out calcDrawEtc from drawLayers

cc/layer_tree_host_impl.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYER_TREE_HOST_IMPL_H_
 #define CC_LAYER_TREE_HOST_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
@@ skipping 226 matching lines @@
 
     SkColor backgroundColor() const { return m_backgroundColor; }
     void setBackgroundColor(SkColor color) { m_backgroundColor = color; }
 
     bool hasTransparentBackground() const { return m_hasTransparentBackground; }
     void setHasTransparentBackground(bool transparent) { m_hasTransparentBackground = transparent; }
 
     bool needsAnimateLayers() const { return m_needsAnimateLayers; }
     void setNeedsAnimateLayers() { m_needsAnimateLayers = true; }
 
+    bool needsUpdateLayers() const { return m_needsUpdateLayers; }
+    void setNeedsUpdateLayers() { m_needsUpdateLayers = true; }
+
     void setNeedsRedraw();
 
     void renderingStats(RenderingStats*) const;
 
     void updateRootScrollLayerImplTransform();
 
     FrameRateCounter* fpsCounter() const { return m_fpsCounter.get(); }
     DebugRectHistory* debugRectHistory() const { return m_debugRectHistory.get(); }
     ResourceProvider* resourceProvider() const { return m_resourceProvider.get(); }
     Proxy* proxy() const { return m_proxy; }
@@ skipping 30 matching lines @@
 
     template<typename RenderPassCuller>
     static void removeRenderPasses(RenderPassCuller, FrameData&);
 
 protected:
     LayerTreeHostImpl(const LayerTreeSettings&, LayerTreeHostImplClient*, Proxy*);
 
     void animatePageScale(base::TimeTicks monotonicTime);
     void animateScrollbars(base::TimeTicks monotonicTime);
 
+    void updateLayers();
+
     // Exposed for testing.
     void calculateRenderSurfaceLayerList(LayerList&);
 
     // Virtual for testing.
     virtual void animateLayers(base::TimeTicks monotonicTime, base::Time wallClockTime);
 
     // Virtual for testing.
     virtual base::TimeDelta lowFrequencyAnimationInterval() const;
 
     LayerTreeHostImplClient* m_client;
@@ skipping 43 matching lines @@
     float m_deviceScaleFactor;
     bool m_visible;
     bool m_contentsTexturesPurged;
     ManagedMemoryPolicy m_managedMemoryPolicy;
 
     SkColor m_backgroundColor;
     bool m_hasTransparentBackground;
 
     // If this is true, it is necessary to traverse the layer tree ticking the animators.
     bool m_needsAnimateLayers;
+    bool m_needsUpdateLayers;
     bool m_pinchGestureActive;
     gfx::Point m_previousPinchAnchor;
 
     scoped_ptr<PageScaleAnimation> m_pageScaleAnimation;
 
     // This is used for ticking animations slowly when hidden.
     scoped_ptr<LayerTreeHostImplTimeSourceAdapter> m_timeSourceClientAdapter;
 
     LayerSorter m_layerSorter;
 
@@ skipping 10 matching lines @@
     size_t m_numMainThreadScrolls;
 
     size_t m_cumulativeNumLayersDrawn;
 
     DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYER_TREE_HOST_IMPL_H_