Disable partial swaps for webview guest renderer until we can figure out how to do that properly.

content/common/gpu/image_transport_surface_mac.cc

 // 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.
 
 #include "content/common/gpu/image_transport_surface.h"
 
 #include "base/mac/scoped_cftyperef.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/gpu/texture_image_transport_surface.h"
@@ skipping 422 matching lines @@
 bool g_allow_os_mesa = false;
 
 }  // namespace
 
 // static
 scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateSurface(
     GpuChannelManager* manager,
     GpuCommandBufferStub* stub,
     const gfx::GLSurfaceHandle& surface_handle) {
   scoped_refptr<gfx::GLSurface> surface;
-  if (surface_handle.transport_type == gfx::TEXTURE_TRANSPORT) {
+  if (surface_handle.transport_type == gfx::TEXTURE_TRANSPORT ||
+      surface_handle.transport_type ==
+          gfx::TEXTURE_TRANSPORT_NO_PARTIAL_SWAP) {
      surface = new TextureImageTransportSurface(manager, stub, surface_handle);
   } else {
     DCHECK(surface_handle.transport_type == gfx::NATIVE_TRANSPORT);
     IOSurfaceSupport* io_surface_support = IOSurfaceSupport::Initialize();
 
     switch (gfx::GetGLImplementation()) {
       case gfx::kGLImplementationDesktopGL:
       case gfx::kGLImplementationAppleGL:
         if (!io_surface_support) {
           DLOG(WARNING) << "No IOSurface support";
@@ skipping 20 matching lines @@
   else
     return NULL;
 }
 
 // static
 void ImageTransportSurface::SetAllowOSMesaForTesting(bool allow) {
   g_allow_os_mesa = allow;
 }
 
 }  // namespace content