Split WebGraphicsContext3DCommandBufferImpl::initialize() into two stages.

content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.h

Index: content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.h
===================================================================
--- content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.h	(revision 97867)
+++ content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.h	(working copy)
@@ -12,6 +12,7 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "content/renderer/gpu/renderer_gl_context.h"
+#include "googleurl/src/gurl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
@@ -431,6 +432,9 @@
           WebGraphicsSwapBuffersCompleteCallbackCHROMIUM* callback);
 
  private:
+  // Second stage init. Called from compositor thread via makeContextCurrent().
+  bool InitializeGLES2();
+
   // SwapBuffers callback.
   void OnSwapBuffersComplete();
   virtual void OnContextLost(RendererGLContext::ContextLostReason reason);
@@ -440,6 +444,11 @@
   // The GLES2Implementation we use for OpenGL rendering.
   gpu::gles2::GLES2Implementation* gl_;
 
+  // State needed by InitializeGLES2.
+  GpuChannelHost* host_;
+  GURL active_url_;
+  int32 render_view_routing_id_;
+
   bool render_directly_to_web_view_;
 #ifndef WTF_USE_THREADED_COMPOSITING
   // If rendering directly to WebView, weak pointer to it.