Mus: Install SwapBuffersCompleted/VSync callbacks to DirectOutputSurface(Ozone)

gpu/ipc/gl_in_process_context.h

Index: gpu/ipc/gl_in_process_context.h
diff --git a/gpu/ipc/gl_in_process_context.h b/gpu/ipc/gl_in_process_context.h
index 83aeb09cb1cefc1da022c4af191737f7d86d0d39..916dcf5cc057fc127448026369ff9256f22d5431 100644
--- a/gpu/ipc/gl_in_process_context.h
+++ b/gpu/ipc/gl_in_process_context.h
@@ -59,6 +59,8 @@ class GL_IN_PROCESS_CONTEXT_EXPORT GLInProcessContext {
       ImageFactory* image_factory,
       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
+  virtual gpu::Capabilities GetCapabilities() = 0;
+
   // Allows direct access to the GLES2 implementation so a GLInProcessContext
   // can be used without making it current.
   virtual gles2::GLES2Implementation* GetImplementation() = 0;