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

ui/ozone/public/native_pixmap_manager.cc

+// Copyright 2015 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/ozone/public/native_pixmap_manager.h"
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "base/trace_event/trace_event.h"
+#include "ui/ozone/platform_object.h"
+#include "ui/ozone/platform_selection.h"
+#include "ui/ozone/public/ozone_platform.h"
+#include "ui/ozone/public/ozone_switches.h"
+
+namespace ui {
+
+namespace {
+
+class StubNativePixmapManager : public NativePixmapManager {
+ public:
+  StubNativePixmapManager() {}
+  ~StubNativePixmapManager() override {}
+
+  void Initialize(const base::FileDescriptor& device_fd) override {}
+
+  std::vector<Configuration> GetSupportedNativePixmapConfigurations()
+      const override {
+    return std::vector<Configuration>();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(StubNativePixmapManager);
+};
+
+NativePixmapManager* g_instance = NULL;
+
+}  // namespace
+
+// static
+NativePixmapManager* NativePixmapManager::GetInstance() {
+  DCHECK(g_instance);
+  return g_instance;
+}
+
+// static
+void NativePixmapManager::SetInstance(NativePixmapManager* instance) {
+  DCHECK(!g_instance || !instance);
+  g_instance = instance;
+}
+
+// static
+scoped_ptr<NativePixmapManager> NativePixmapManager::Create(
+    const base::FileDescriptor& device_fd) {
+  TRACE_EVENT1("ozone", "NativePixmapManager::Create", "platform",
+               GetOzonePlatformName());
+  scoped_ptr<NativePixmapManager> manager =
+      PlatformObject<NativePixmapManager>::Create();
+  manager->Initialize(device_fd);
+  return manager.Pass();
+}
+
+NativePixmapManager::NativePixmapManager() {
+}
+
+NativePixmapManager::~NativePixmapManager() {
+}
+
+NativePixmapManager* CreateStubNativePixmapManager() {
+  return new StubNativePixmapManager;
+}
+
+}  // namespace ui