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

ui/gfx/compositor/compositor_gl.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/compositor/compositor_gl.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 233 matching lines @@
       return false;
     }
   }
 
   surface_ = gfx::GLSurface::CreateOffscreenGLSurface(false, gfx::Size(1, 1));
   if (!surface_.get()) {
     LOG(ERROR) << "Unable to create offscreen GL surface.";
     return false;
   }
 
-  context_ = gfx::GLContext::CreateGLContext(NULL, surface_.get());
+  context_ = gfx::GLContext::CreateGLContext(
+      NULL,
+      surface_.get(),
+      gfx::PreferIntegratedGpu);
   if (!context_.get()) {
     LOG(ERROR) << "Unable to create GL context.";
     return false;
   }
 
   program_no_swizzle_.reset();
   program_swizzle_.reset();
 
   context_->MakeCurrent(surface_.get());
 
@@ skipping 31 matching lines @@
 bool SharedResources::MakeSharedContextCurrent() {
   if (!initialized_)
     return false;
   else
     return context_->MakeCurrent(surface_.get());
 }
 
 scoped_refptr<gfx::GLContext> SharedResources::CreateContext(
     gfx::GLSurface* surface) {
   if (initialized_)
-    return gfx::GLContext::CreateGLContext(context_->share_group(), surface);
+    return gfx::GLContext::CreateGLContext(
+        context_->share_group(),
+        surface,
+        gfx::PreferIntegratedGpu);
   else
     return NULL;
 }
 
 TextureGL::TextureGL() : texture_id_(0) {
 }
 
 TextureGL::TextureGL(const gfx::Size& size) : texture_id_(0), size_(size) {
 }
 
@@ skipping 220 matching lines @@
 Compositor* Compositor::Create(CompositorDelegate* owner,
                                gfx::AcceleratedWidget widget,
                                const gfx::Size& size) {
   if (SharedResources::GetInstance() == NULL)
     return NULL;
   else
     return new CompositorGL(owner, widget, size);
 }
 
 }  // namespace ui