Add FBO support in Android WebView

gpu/command_buffer/service/in_process_command_buffer.h

Index: gpu/command_buffer/service/in_process_command_buffer.h
diff --git a/gpu/command_buffer/service/in_process_command_buffer.h b/gpu/command_buffer/service/in_process_command_buffer.h
index 18c919ff1ca4a552ec208f1b5585166aa966a5c7..b26a6bb7c1f474c866e6870099fbc8bed4f77cb2 100644
--- a/gpu/command_buffer/service/in_process_command_buffer.h
+++ b/gpu/command_buffer/service/in_process_command_buffer.h
@@ -17,6 +17,7 @@
 #include "gpu/gpu_export.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/native_widget_types.h"
+#include "ui/gl/gl_surface.h"
 #include "ui/gl/gpu_preference.h"
 
 namespace gfx {
@@ -57,7 +58,10 @@ class GPU_EXPORT InProcessCommandBuffer : public CommandBuffer {
 
   static void EnableVirtualizedContext();
 
-  bool Initialize(bool is_offscreen,
+  // If |surface| is not NULL, use it directly. Otherwise create a new
+  // GLSurface.
+  bool Initialize(scoped_refptr<gfx::GLSurface> surface,
+                  bool is_offscreen,
                   bool share_resources,
                   gfx::AcceleratedWidget window,
                   const gfx::Size& size,