toggle FPS counter in compositor

cc/layer_tree_host.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 CCLayerTreeHost_h
 #define CCLayerTreeHost_h
 
 #include <limits>
 
 #include "CCAnimationEvents.h"
@@ skipping 34 matching lines @@
 class CCTextureUpdateQueue;
 class HeadsUpDisplayLayerChromium;
 class Region;
 struct CCScrollAndScaleSet;
 
 struct CCLayerTreeSettings {
     CCLayerTreeSettings();
     ~CCLayerTreeSettings();
 
     bool acceleratePainting;
-    bool showFPSCounter;
     bool showPlatformLayerTree;
     bool showPaintRects;
     bool showPropertyChangedRects;
     bool showSurfaceDamageRects;
     bool showScreenSpaceRects;
     bool showReplicaScreenSpaceRects;
     bool showOccludingRects;
     bool renderVSyncEnabled;
     double refreshRate;
     size_t maxPartialTextureUpdates;
     IntSize defaultTileSize;
     IntSize maxUntiledLayerSize;
     IntSize minimumOcclusionTrackingSize;
 
-    bool showDebugInfo() const { return showPlatformLayerTree || showFPSCounter || showDebugRects(); }
     bool showDebugRects() const { return showPaintRects || showPropertyChangedRects || showSurfaceDamageRects || showScreenSpaceRects || showReplicaScreenSpaceRects || showOccludingRects; }
 };
 
 // Provides information on an Impl's rendering capabilities back to the CCLayerTreeHost
 struct RendererCapabilities {
     RendererCapabilities();
     ~RendererCapabilities();
 
     GLenum bestTextureFormat;
     bool contextHasCachedFrontBuffer;
@@ skipping 112 matching lines @@
     // RateLimitClient implementation
     virtual void rateLimit() OVERRIDE;
 
     bool bufferedUpdates();
     bool requestPartialTextureUpdate();
     void deleteTextureAfterCommit(scoped_ptr<CCPrioritizedTexture>);
 
     void setDeviceScaleFactor(float);
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
 
+    void setShowFPSCounter(bool show);
+    bool hasFontAtlas() const;
     void setFontAtlas(scoped_ptr<CCFontAtlas>);
 
     HeadsUpDisplayLayerChromium* hudLayer() const { return m_hudLayer.get(); }
 
 protected:
     CCLayerTreeHost(CCLayerTreeHostClient*, const CCLayerTreeSettings&);
     bool initialize();
 
 private:
     typedef std::vector<scoped_refptr<LayerChromium> > LayerList;
 
     void initializeRenderer();
 
     void update(LayerChromium*, CCTextureUpdateQueue&, const CCOcclusionTracker*);
     bool paintLayerContents(const LayerList&, CCTextureUpdateQueue&);
     bool paintMasksForRenderSurface(LayerChromium*, CCTextureUpdateQueue&);
 
     void updateLayers(LayerChromium*, CCTextureUpdateQueue&);
 
     void prioritizeTextures(const LayerList&, CCOverdrawMetrics&); 
     void setPrioritiesForSurfaces(size_t surfaceMemoryBytes);
     void setPrioritiesForLayers(const LayerList&);
     size_t calculateMemoryForRenderSurfaces(const LayerList& updateList);
 
     void animateLayers(double monotonicTime);
     bool animateLayersRecursive(LayerChromium* current, double monotonicTime);
     void setAnimationEventsRecursive(const CCAnimationEventsVector&, LayerChromium*, double wallClockTime);
 
+    void createHUDLayerIfNeeded();
+
     bool m_animating;
     bool m_needsAnimateLayers;
 
     CCLayerTreeHostClient* m_client;
 
     int m_commitNumber;
     CCRenderingStats m_renderingStats;
 
     scoped_ptr<CCProxy> m_proxy;
     bool m_rendererInitialized;
     bool m_contextLost;
     int m_numTimesRecreateShouldFail;
     int m_numFailedRecreateAttempts;
 
     scoped_refptr<LayerChromium> m_rootLayer;
     scoped_refptr<HeadsUpDisplayLayerChromium> m_hudLayer;
-    scoped_ptr<CCFontAtlas> m_fontAtlas;
 
     scoped_ptr<CCPrioritizedTextureManager> m_contentsTextureManager;
     scoped_ptr<CCPrioritizedTexture> m_surfaceMemoryPlaceholder;
 
     CCLayerTreeSettings m_settings;
 
     IntSize m_layoutViewportSize;
     IntSize m_deviceViewportSize;
     float m_deviceScaleFactor;
 
@@ skipping 15 matching lines @@
     size_t m_partialTextureUpdateRequests;
 
     static bool s_needsFilterContext;
 
     DISALLOW_COPY_AND_ASSIGN(CCLayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif