Make remote CoreAnimation GPU-switching aware

content/common/gpu/image_transport_surface_calayer_mac.mm

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/gpu/image_transport_surface_calayer_mac.h"
 
+#include <OpenGL/CGLRenderers.h>
+
 #include "base/command_line.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "content/common/gpu/surface_handle_types_mac.h"
 #include "ui/base/cocoa/animation_utils.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gl/gl_gl_api_implementation.h"
 #include "ui/gl/gl_switches.h"
 
 @interface ImageTransportLayer : CAOpenGLLayer {
   content::CALayerStorageProvider* storageProvider_;
@@ skipping 267 matching lines @@
     glTexCoord2f(fbo_pixel_size_.width(), fbo_pixel_size_.height());
     glVertex2f(fbo_pixel_size_.width(), fbo_pixel_size_.height());
 
     glTexCoord2f(fbo_pixel_size_.width(), 0);
     glVertex2f(fbo_pixel_size_.width(), 0);
   }
   glEnd();
   glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
   glDisable(GL_TEXTURE_RECTANGLE_ARB);
 
+  GLint current_renderer_id = 0;
+  if (CGLGetParameter(CGLGetCurrentContext(),
+                      kCGLCPCurrentRendererID,
+                      &current_renderer_id) == kCGLNoError) {
+    current_renderer_id &= kCGLRendererIDMatchingMask;
+    transport_surface_->SetRendererID(current_renderer_id);
+  }
+
   // Allow forward progress in the context now that the swap is complete.
   UnblockBrowserIfNeeded();
 }
 
 void CALayerStorageProvider::LayerResetStorageProvider() {
   // If we are providing back-pressure by waiting for a draw, that draw will
   // now never come, so release the pressure now.
   UnblockBrowserIfNeeded();
 }
 
 void CALayerStorageProvider::UnblockBrowserIfNeeded() {
   if (!has_pending_draw_)
     return;
   pending_draw_weak_factory_.InvalidateWeakPtrs();
   has_pending_draw_ = false;
   transport_surface_->SendSwapBuffers(
       SurfaceHandleFromCAContextID([context_ contextId]),
       fbo_pixel_size_,
       fbo_scale_factor_);
 }
 
 }  //  namespace content