Enforce RGB even on buggy drivers.

gpu/command_buffer/service/framebuffer_manager.h

Index: gpu/command_buffer/service/framebuffer_manager.h
diff --git a/gpu/command_buffer/service/framebuffer_manager.h b/gpu/command_buffer/service/framebuffer_manager.h
index 362e0b8f5b719e7a0428094f315c11b3746d54a5..0641c35fa78095082552710f9db7035e20f5da67 100644
--- a/gpu/command_buffer/service/framebuffer_manager.h
+++ b/gpu/command_buffer/service/framebuffer_manager.h
@@ -36,6 +36,7 @@ class FramebufferManager {
       virtual GLsizei samples() const = 0;
       virtual bool cleared() const = 0;
       virtual void set_cleared() = 0;
+      virtual bool IsTexture(TextureManager::TextureInfo* texture) const = 0;
     };
 
     explicit FramebufferInfo(GLuint service_id);
@@ -72,8 +73,12 @@ class FramebufferManager {
       return has_been_bound_ && !IsDeleted();
     }
 
+    bool HasDepthAttachment() const;
+    bool HasStencilAttachment() const;
+    GLenum GetColorAttachmentFormat() const;
+
     // We can't know if the frame buffer is complete since that is
-    // implementation  dependent and we'd have to check after every glTexImage
+    // implementation dependent and we'd have to check after every glTexImage
     // call but we can know in certain cases that it's NOT complete which we
     // need to enforce the OpenGL ES 2.0 spec on top of DesktopGL.
     bool IsNotComplete() const;