gpu: Refactor GpuMemoryBuffer framework for multi-process support.

ui/gl/gl_image.h

Index: ui/gl/gl_image.h
diff --git a/ui/gl/gl_image.h b/ui/gl/gl_image.h
index f1d05371f6beeae8de923774023a8e8978b05dac..60cf9baf10d2a4779e9ee5f87cbafd4ad2989090 100644
--- a/ui/gl/gl_image.h
+++ b/ui/gl/gl_image.h
@@ -38,7 +38,9 @@ class GL_EXPORT GLImage : public base::RefCounted<GLImage> {
 
   // Create a GL image for a GPU Memory buffer.
   static scoped_refptr<GLImage> CreateGLImageForGpuMemoryBuffer(
-      gfx::GpuMemoryBufferHandle buffer, gfx::Size size);
+      gfx::GpuMemoryBufferHandle buffer,
+      const gfx::Size& size,

[kaanb, 2013/07/31 23:44:05]

wasn't there a consensus on passing structs with sizeof() less than 16 bytes by
value?

[reveman, 2013/08/01 13:32:18]

maybe, I'll change this in that case. not clear to me why we can't just leave
that decision to the compiler though.

+      unsigned internalformat);
 
  protected:
   virtual ~GLImage();