Support dynamic switching between integrated and discrete GPUs on Mac OS X.

ui/gfx/gl/gl_share_group.cc

 // Copyright (c) 2011 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 "ui/gfx/gl/gl_share_group.h"
 
 #include "ui/gfx/gl/gl_context.h"
 
 namespace gfx {
 
 GLShareGroup::GLShareGroup() {
 }
 
 void GLShareGroup::AddContext(GLContext* context) {
   contexts_.insert(context);
 }
 
 void GLShareGroup::RemoveContext(GLContext* context) {
   contexts_.erase(context);
 }
 
 void* GLShareGroup::GetHandle() {
+  GLContext* context = GetContext();
+  if (context)
+    return context->GetHandle();
+
+  return NULL;
+}
+
+GLContext* GLShareGroup::GetContext() {
   for (ContextSet::iterator it = contexts_.begin();
        it != contexts_.end();
        ++it) {
-     if ((*it)->GetHandle())
-       return (*it)->GetHandle();
+    if ((*it)->GetHandle())
+      return *it;
   }
 
   return NULL;
 }
 
 GLShareGroup::~GLShareGroup() {
 }
 
 }  // namespace gfx