Add the DelegatingRenderer class with its initialize path.

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 51 matching lines @@
     virtual void setVisible(bool) 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 isFramebufferDiscarded() const { return m_isFramebufferDiscarded; }
-    bool initialize();
+    bool initialize(ResourceProvider*);
 
     const gfx::QuadF& sharedGeometryQuad() const { return m_sharedGeometryQuad; }
     const GeometryBinding* sharedGeometry() const { return m_sharedGeometry.get(); }
 
     bool getFramebufferTexture(ScopedResource*, const gfx::Rect& deviceRect);
     void releaseRenderPassTextures();
 
     virtual void bindFramebufferToOutputSurface(DrawingFrame&) OVERRIDE;
     virtual bool bindFramebufferToTexture(DrawingFrame&, const ScopedResource*, const gfx::Rect& framebufferRect) OVERRIDE;
     virtual void setDrawViewportSize(const gfx::Size&) OVERRIDE;
@@ skipping 162 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_