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

webkit/plugins/npapi/webplugin_delegate_impl_mac.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 #import <QuartzCore/QuartzCore.h>
 
 #include "webkit/plugins/npapi/webplugin_delegate_impl.h"
 
 #include <string>
@@ skipping 366 matching lines @@
       // the surface.
       CALayer* layer = nil;
       NPError err = instance()->NPP_GetValue(NPPVpluginCoreAnimationLayer,
                                              reinterpret_cast<void*>(&layer));
       if (!err) {
         if (drawing_model == NPDrawingModelCoreAnimation) {
           // Create the timer; it will be started when we get a window handle.
           redraw_timer_.reset(new base::RepeatingTimer<WebPluginDelegateImpl>);
         }
         layer_ = layer;
-        surface_ = plugin_->GetAcceleratedSurface();
+
+        gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
+        // On dual GPU systems, force the use of the discrete GPU for
+        // the CARenderer underlying our Core Animation backend for
+        // all plugins except Flash. For some reason Unity3D's output
+        // doesn't show up if the integrated GPU is used. Safari keeps
+        // even Flash 11 with Stage3D on the integrated GPU, so mirror
+        // that behavior here.
+        const WebPluginInfo& plugin_info =
+            instance_->plugin_lib()->plugin_info();
+        if (plugin_info.name.find(ASCIIToUTF16("Flash")) != string16::npos)
+          gpu_preference = gfx::PreferIntegratedGpu;
+        surface_ = plugin_->GetAcceleratedSurface(gpu_preference);
 
         // If surface initialization fails for some reason, just continue
         // without any drawing; returning false would be a more confusing user
         // experience (since it triggers a missing plugin placeholder).
         if (surface_ && surface_->context()) {
           renderer_ = [[CARenderer rendererWithCGLContext:surface_->context()
                                                   options:NULL] retain];
           [renderer_ setLayer:layer_];
         }
         plugin_->BindFakePluginWindowHandle(false);
@@ skipping 811 matching lines @@
   qd_manager_->SetFastPathEnabled(enabled);
   qd_port_.port = qd_manager_->port();
   WindowlessSetWindow();
   // Send a paint event so that the new buffer gets updated immediately.
   WindowlessPaint(buffer_context_, clip_rect_);
 }
 #endif  // !NP_NO_QUICKDRAW
 
 }  // namespace npapi
 }  // namespace webkit