Switch all contexts in a share group to be on the same screen as the window they present to.

content/browser/renderer_host/compositing_iosurface_mac.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_COMPOSITING_VIEW_MAC_H
 #define CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_COMPOSITING_VIEW_MAC_H
 
 #import <Cocoa/Cocoa.h>
 #import <QuartzCore/CVDisplayLink.h>
 #include <QuartzCore/QuartzCore.h>
@@ skipping 32 matching lines @@
   // Returns NULL if IOSurface support is missing or GL APIs fail. Specify in
   // |order| the desired ordering relationship of the surface to the containing
   // window.
   static CompositingIOSurfaceMac* Create(SurfaceOrder order);
   ~CompositingIOSurfaceMac();
 
   // Set IOSurface that will be drawn on the next NSView drawRect.
   void SetIOSurface(uint64 io_surface_handle,
                     const gfx::Size& size);
 
+  // Get the CGL renderer currently associated with this context.

[Ken Russell (switch to Gerrit), 2013/03/01 22:00:58]

Please adjust renderer -> renderer ID for clarity.

[jbauman, 2013/03/02 03:52:23]

Ok, done everywhere.

+  int GetRenderer();
+
   // Blit the IOSurface at the upper-left corner of the |view|. If |view| window
   // size is larger than the IOSurface, the remaining right and bottom edges
   // will be white. |scaleFactor| is 1 in normal views, 2 in HiDPI views.
   void DrawIOSurface(NSView* view, float scale_factor);
 
   // Copy the data of the "live" OpenGL texture referring to this IOSurfaceRef
   // into |out|. The copied region is specified with |src_pixel_subrect| and
   // the data is transformed so that it fits in |dst_pixel_size|.
   // |src_pixel_subrect| and |dst_pixel_size| are not in DIP but in pixel.
   // Caller must ensure that |out| is allocated to dimensions that match
@@ skipping 227 matching lines @@
   uint32 vsync_interval_denominator_;
 
   bool initialized_is_intel_;
   bool is_intel_;
   GLint screen_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_ACCELERATED_COMPOSITING_VIEW_MAC_H