Fix assorted issues with remote CoreAnimation

ui/gl/gl_gl_api_implementation.h

Index: ui/gl/gl_gl_api_implementation.h
diff --git a/ui/gl/gl_gl_api_implementation.h b/ui/gl/gl_gl_api_implementation.h
index 6e0f7f1daf7b03585eea33d429531ff33b2d88e9..22faccd689763a5563a635950fde3e3046fa06d1 100644
--- a/ui/gl/gl_gl_api_implementation.h
+++ b/ui/gl/gl_gl_api_implementation.h
@@ -7,6 +7,7 @@
 
 #include "base/compiler_specific.h"
 #include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_export.h"
 
 namespace gpu {
 namespace gles2 {
@@ -117,6 +118,15 @@ private:
   std::string extensions_;
 };
 
+class GL_EXPORT ScopedSetGLToRealGLApi {
+ public:
+  ScopedSetGLToRealGLApi();
+  ~ScopedSetGLToRealGLApi();
+
+ private:
+  GLApi* old_gl_api_;
+};
+
 }  // namespace gfx
 
 #endif  // UI_GL_GL_GL_API_IMPLEMENTATION_H_