Initial ui/gl updates for Mac Sky shell target

ui/gl/gl_context_cgl.h

Index: ui/gl/gl_context_cgl.h
diff --git a/ui/gl/gl_context_glx.h b/ui/gl/gl_context_cgl.h
similarity index 55%
copy from ui/gl/gl_context_glx.h
copy to ui/gl/gl_context_cgl.h
index 6973542c0aa25b9824331e8bf5a9035bd4514b20..88813b39cc197b298ec4a34889a5fb003067aa8b 100644
--- a/ui/gl/gl_context_glx.h
+++ b/ui/gl/gl_context_cgl.h
@@ -2,26 +2,21 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_GL_GL_CONTEXT_GLX_H_
-#define UI_GL_GL_CONTEXT_GLX_H_
+#ifndef UI_GL_GL_CONTEXT_CGL_H_
+#define UI_GL_GL_CONTEXT_CGL_H_
 
-#include <string>
+#include <OpenGL/CGLTypes.h>
 
-#include "base/compiler_specific.h"
-#include "ui/gfx/x/x11_types.h"
 #include "ui/gl/gl_context.h"
-#include "ui/gl/gl_export.h"
 
 namespace gfx {
 
 class GLSurface;
 
-// Encapsulates a GLX OpenGL context.
-class GL_EXPORT GLContextGLX : public GLContextReal {
+// Encapsulates a CGL OpenGL context.
+class GLContextCGL : public GLContextReal {
  public:
-  explicit GLContextGLX(GLShareGroup* share_group);
-
-  XDisplay* display();
+  explicit GLContextCGL(GLShareGroup* share_group);
 
   // Implement GLContext.
   bool Initialize(GLSurface* compatible_surface,
@@ -32,20 +27,28 @@ class GL_EXPORT GLContextGLX : public GLContextReal {
   bool IsCurrent(GLSurface* surface) override;
   void* GetHandle() override;
   void OnSetSwapInterval(int interval) override;
-  std::string GetExtensions() override;
   bool GetTotalGpuMemory(size_t* bytes) override;
-  bool WasAllocatedUsingRobustnessExtension() override;
+  void SetSafeToForceGpuSwitch() override;
+  bool ForceGpuSwitchIfNeeded() override;
 
  protected:
-  ~GLContextGLX() override;
+  ~GLContextCGL() override;
 
  private:
+  GpuPreference GetGpuPreference();
+
   void* context_;
-  XDisplay* display_;
+  GpuPreference gpu_preference_;
+
+  CGLPixelFormatObj discrete_pixelformat_;
+
+  int screen_;
+  int renderer_id_;
+  bool safe_to_force_gpu_switch_;
 
-  DISALLOW_COPY_AND_ASSIGN(GLContextGLX);
+  DISALLOW_COPY_AND_ASSIGN(GLContextCGL);
 };
 
 }  // namespace gfx
 
-#endif  // UI_GL_GL_CONTEXT_GLX_H_
+#endif  // UI_GL_GL_CONTEXT_CGL_H_