ozone: Introduce ClientPixmap and ClientPixmapFactory for non-GPU processes.

ui/ozone/public/ozone_platform.cc

 // Copyright 2014 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 "base/command_line.h"
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/ozone/platform_object.h"
 #include "ui/ozone/platform_selection.h"
+#include "ui/ozone/public/native_pixmap_client.h"
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/ozone/public/ozone_switches.h"
 
 namespace ui {
 
 namespace {
 
 bool g_platform_initialized_ui = false;
 bool g_platform_initialized_gpu = false;
 
@@ skipping 14 matching lines @@
 // static
 void OzonePlatform::InitializeForUI() {
   CreateInstance();
   if (g_platform_initialized_ui)
     return;
   g_platform_initialized_ui = true;
   instance_->InitializeUI();
   // This is deliberately created after initializing so that the platform can
   // create its own version of DDM.
   DeviceDataManager::CreateInstance();
+
+  NativePixmapClient::InitializeIfNeeded();

[dshwang, 2015/06/03 14:11:51]

Browser process always initializes it unlike Renderer.

[spang, 2015/06/05 19:21:54]

Why does the browser need it? Is there a case where GPU memory buffers are
mapped in the browser?

[reveman, 2015/06/05 20:26:07]

The UI compositor.

 }
 
 // static
 void OzonePlatform::InitializeForGPU() {
   CreateInstance();
   if (g_platform_initialized_gpu)
     return;
   g_platform_initialized_gpu = true;
   instance_->InitializeGPU();
 }
@@ skipping 17 matching lines @@
     // TODO(spang): Currently need to leak this object.
     OzonePlatform* pl = platform.release();
     DCHECK_EQ(instance_, pl);
   }
 }
 
 // static
 OzonePlatform* OzonePlatform::instance_;
 
 }  // namespace ui