Add latency measurement system

cc/gl_renderer.h

 // Copyright 2010 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_GL_RENDERER_H_
 #define CC_GL_RENDERER_H_
 
 #include "cc/cc_export.h"
 #include "cc/checkerboard_draw_quad.h"
 #include "cc/debug_border_draw_quad.h"
@@ skipping 18 matching lines @@
 class ScopedResource;
 class StreamVideoDrawQuad;
 class TextureDrawQuad;
 class GeometryBinding;
 class ScopedEnsureFramebufferAllocation;
 
 // Class that handles drawing of composited render layers using GL.
 class CC_EXPORT GLRenderer : public DirectRenderer,
                              public NON_EXPORTED_BASE(WebKit::WebGraphicsContext3D::WebGraphicsSwapBuffersCompleteCallbackCHROMIUM),
                              public NON_EXPORTED_BASE(WebKit::WebGraphicsContext3D::WebGraphicsMemoryAllocationChangedCallbackCHROMIUM),
-                             public NON_EXPORTED_BASE(WebKit::WebGraphicsContext3D::WebGraphicsContextLostCallback) {
+                             public NON_EXPORTED_BASE(WebKit::WebGraphicsContext3D::WebGraphicsContextLostCallback),
+                             public NON_EXPORTED_BASE(WebKit::WebGraphicsContext3D::WebGraphicsLatencyInfoCallbackCHROMIUM){

[jamesr, 2013/01/02 23:23:39]

Why do these come back through a WebGraphicsContext3D interface?  They don't
really have anything to do with a context unless it's a view context, and in
that case they seem more logically part of the surface.

 public:
     static scoped_ptr<GLRenderer> create(RendererClient*, ResourceProvider*);
 
     virtual ~GLRenderer();
 
     virtual const RendererCapabilities& capabilities() const OVERRIDE;
 
     WebKit::WebGraphicsContext3D* context();
 
     virtual void viewportChanged() OVERRIDE;
 
     // waits for rendering to finish
     virtual void finish() OVERRIDE;
 
     virtual void doNoOp() OVERRIDE;
     // puts backbuffer onscreen
     virtual bool swapBuffers() OVERRIDE;
 
     virtual void getFramebufferPixels(void *pixels, const gfx::Rect&) OVERRIDE;
 
     virtual bool isContextLost() OVERRIDE;
 
     virtual void setVisible(bool) OVERRIDE;
 
+    virtual void setLatencyInfo(const WebKit::WebLatencyInfoImpl& latency_info) OVERRIDE;
+
     virtual void sendManagedMemoryStats(size_t bytesVisible, size_t bytesVisibleAndNearby, size_t bytesAllocated) OVERRIDE;
 
 protected:
     GLRenderer(RendererClient*, ResourceProvider*);
 
     static void debugGLCall(WebKit::WebGraphicsContext3D*, const char* command, const char* file, int line);
 
     bool isBackbufferDiscarded() const { return m_isBackbufferDiscarded; }
     bool initialize();
 
@@ skipping 56 matching lines @@
 
     // WebKit::WebGraphicsContext3D::WebGraphicsMemoryAllocationChangedCallbackCHROMIUM implementation.
     virtual void onMemoryAllocationChanged(WebKit::WebGraphicsMemoryAllocation) OVERRIDE;
     void discardBackbuffer();
     void ensureBackbuffer();
     void enforceMemoryPolicy();
 
     // WebGraphicsContext3D::WebGraphicsContextLostCallback implementation.
     virtual void onContextLost() OVERRIDE;
 
+    virtual void onReceivedLatencyInfo(const WebKit::WebLatencyInfo& latency_info) OVERRIDE;
+
     RendererCapabilities m_capabilities;
 
     unsigned m_offscreenFramebufferId;
 
     scoped_ptr<GeometryBinding> m_sharedGeometry;
     gfx::QuadF m_sharedGeometryQuad;
 
     // This block of bindings defines all of the programs used by the compositor itself.
 
     // Tiled layer shaders.
@@ skipping 95 matching lines @@
 #if DEBUG_GL_CALLS && !defined(NDEBUG)
 #define GLC(context, x) (x, GLRenderer::debugGLCall(&*context, #x, __FILE__, __LINE__))
 #else
 #define GLC(context, x) (x)
 #endif
 
 
 }
 
 #endif  // CC_GL_RENDERER_H_