[Ozone-GBM] Add basic support for display configuration over IPC

BUG=377497
NOTRY=true

Review URL: https://codereview.chromium.org/377753002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282036 0039d316-1c4b-4281-b951-d872f2087c98

19 files changed, 674 insertions, 6 deletions

diff --git a/ui/ozone/common/chromeos/display_mode_proxy.cc b/ui/ozone/common/chromeos/display_mode_proxy.cc
new file mode 100644
index 0000000..e398c12
--- /dev/null
+++ b/ui/ozone/common/chromeos/display_mode_proxy.cc
@@ -0,0 +1,16 @@
+// 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 "ui/ozone/common/chromeos/display_mode_proxy.h"
+
+#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
+
+namespace ui {
+
+DisplayModeProxy::DisplayModeProxy(const DisplayMode_Params& params)
+    : DisplayMode(params.size, params.is_interlaced, params.refresh_rate) {}
+
+DisplayModeProxy::~DisplayModeProxy() {}
+
+}  // namespace ui
diff --git a/ui/ozone/common/chromeos/display_mode_proxy.h b/ui/ozone/common/chromeos/display_mode_proxy.h
new file mode 100644
index 0000000..436ea08
--- /dev/null
+++ b/ui/ozone/common/chromeos/display_mode_proxy.h
@@ -0,0 +1,25 @@
+// 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.
+
+#ifndef UI_OZONE_COMMON_CHROMEOS_DISPLAY_MODE_PROXY_H_
+#define UI_OZONE_COMMON_CHROMEOS_DISPLAY_MODE_PROXY_H_
+
+#include "ui/display/types/chromeos/display_mode.h"
+
+namespace ui {
+
+struct DisplayMode_Params;
+
+class DisplayModeProxy : public DisplayMode {
+ public:
+  DisplayModeProxy(const DisplayMode_Params& params);
+  virtual ~DisplayModeProxy();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DisplayModeProxy);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_COMMON_CHROMEOS_DISPLAY_MODE_PROXY_H_
diff --git a/ui/ozone/common/chromeos/display_snapshot_proxy.cc b/ui/ozone/common/chromeos/display_snapshot_proxy.cc
new file mode 100644
index 0000000..f634ccf
--- /dev/null
+++ b/ui/ozone/common/chromeos/display_snapshot_proxy.cc
@@ -0,0 +1,53 @@
+// 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 "ui/ozone/common/chromeos/display_snapshot_proxy.h"
+
+#include "ui/ozone/common/chromeos/display_mode_proxy.h"
+#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
+
+namespace ui {
+
+namespace {
+
+bool SameModes(const DisplayMode_Params& lhs, const DisplayMode_Params& rhs) {
+  return lhs.size == rhs.size && lhs.is_interlaced == rhs.is_interlaced &&
+      lhs.refresh_rate == rhs.refresh_rate;
+}
+
+}  // namespace
+
+DisplaySnapshotProxy::DisplaySnapshotProxy(const DisplaySnapshot_Params& params)
+    : DisplaySnapshot(params.display_id,
+                      params.has_proper_display_id,
+                      params.origin,
+                      params.physical_size,
+                      params.type,
+                      params.is_aspect_preserving_scaling,
+                      params.has_overscan,
+                      params.display_name,
+                      std::vector<const DisplayMode*>(),
+                      NULL,
+                      NULL),
+      string_representation_(params.string_representation) {
+  for (size_t i = 0; i < params.modes.size(); ++i) {
+    modes_.push_back(new DisplayModeProxy(params.modes[i]));
+
+    if (params.has_current_mode &&
+        SameModes(params.modes[i], params.current_mode))
+      current_mode_ = modes_.back();
+
+    if (params.has_native_mode &&
+        SameModes(params.modes[i], params.native_mode))
+      native_mode_ = modes_.back();
+  }
+}
+
+DisplaySnapshotProxy::~DisplaySnapshotProxy() {}
+
+std::string DisplaySnapshotProxy::ToString() const {
+  return string_representation_;
+}
+
+}  // namespace ui
diff --git a/ui/ozone/common/chromeos/display_snapshot_proxy.h b/ui/ozone/common/chromeos/display_snapshot_proxy.h
new file mode 100644
index 0000000..f599fe3
--- /dev/null
+++ b/ui/ozone/common/chromeos/display_snapshot_proxy.h
@@ -0,0 +1,30 @@
+// 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.
+
+#ifndef UI_OZONE_COMMON_CHROMEOS_DISPLAY_SNAPSHOT_PROXY_H_
+#define UI_OZONE_COMMON_CHROMEOS_DISPLAY_SNAPSHOT_PROXY_H_
+
+#include "ui/display/types/chromeos/display_snapshot.h"
+
+namespace ui {
+
+struct DisplaySnapshot_Params;
+
+class DisplaySnapshotProxy : public DisplaySnapshot {
+ public:
+  DisplaySnapshotProxy(const DisplaySnapshot_Params& params);
+  virtual ~DisplaySnapshotProxy();
+
+  // DisplaySnapshot override:
+  virtual std::string ToString() const OVERRIDE;
+
+ private:
+  std::string string_representation_;
+
+  DISALLOW_COPY_AND_ASSIGN(DisplaySnapshotProxy);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_COMMON_CHROMEOS_DISPLAY_SNAPSHOT_PROXY_H_
diff --git a/ui/ozone/common/chromeos/display_util.cc b/ui/ozone/common/chromeos/display_util.cc
new file mode 100644
index 0000000..674f8c1
--- /dev/null
+++ b/ui/ozone/common/chromeos/display_util.cc
@@ -0,0 +1,48 @@
+// 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 "ui/ozone/common/chromeos/display_util.h"
+
+#include "ui/display/types/chromeos/display_mode.h"
+#include "ui/display/types/chromeos/display_snapshot.h"
+
+namespace ui {
+
+DisplayMode_Params GetDisplayModeParams(const DisplayMode& mode) {
+  DisplayMode_Params params;
+  params.size = mode.size();
+  params.is_interlaced = mode.is_interlaced();
+  params.refresh_rate = mode.refresh_rate();
+
+  return params;
+}
+
+DisplaySnapshot_Params GetDisplaySnapshotParams(
+    const DisplaySnapshot& display) {
+  DisplaySnapshot_Params params;
+  params.display_id = display.display_id();
+  params.has_proper_display_id = display.has_proper_display_id();
+  params.origin = display.origin();
+  params.physical_size = display.physical_size();
+  params.type = display.type();
+  params.is_aspect_preserving_scaling = display.is_aspect_preserving_scaling();
+  params.has_overscan = display.has_overscan();
+  params.display_name = display.display_name();
+  for (size_t i = 0; i < display.modes().size(); ++i)
+    params.modes.push_back(GetDisplayModeParams(*display.modes()[i]));
+
+  params.has_current_mode = display.current_mode() != NULL;
+  if (params.has_current_mode)
+    params.current_mode = GetDisplayModeParams(*display.current_mode());
+
+  params.has_native_mode = display.native_mode() != NULL;
+  if (params.has_native_mode)
+    params.native_mode = GetDisplayModeParams(*display.native_mode());
+
+  params.string_representation = display.ToString();
+
+  return params;
+}
+
+}  // namespace ui
diff --git a/ui/ozone/common/chromeos/display_util.h b/ui/ozone/common/chromeos/display_util.h
new file mode 100644
index 0000000..f02bf09
--- /dev/null
+++ b/ui/ozone/common/chromeos/display_util.h
@@ -0,0 +1,21 @@
+// 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.
+
+#ifndef UI_OZONE_COMMON_CHROMEOS_DISPLAY_UTIL_H_
+#define UI_OZONE_COMMON_CHROMEOS_DISPLAY_UTIL_H_
+
+#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
+
+namespace ui {
+
+class DisplayMode;
+class DisplaySnapshot;
+
+DisplayMode_Params GetDisplayModeParams(const DisplayMode& mode);
+DisplaySnapshot_Params GetDisplaySnapshotParams(
+    const DisplaySnapshot& display);
+
+}  // namespace ui
+
+#endif  // UI_OZONE_COMMON_CHROMEOS_DISPLAY_UTIL_H_
diff --git a/ui/ozone/ozone.gyp b/ui/ozone/ozone.gyp
index 6cdf292..c000a2e 100644
--- a/ui/ozone/ozone.gyp
+++ b/ui/ozone/ozone.gyp
@@ -85,6 +85,12 @@
         # common/chromeos files are excluded automatically when building with
         # chromeos=0, by exclusion rules in filename_rules.gypi due to the
         # 'chromeos' folder name.
+        'common/chromeos/display_mode_proxy.cc',
+        'common/chromeos/display_mode_proxy.h',
+        'common/chromeos/display_snapshot_proxy.cc',
+        'common/chromeos/display_snapshot_proxy.h',
+        'common/chromeos/display_util.cc',
+        'common/chromeos/display_util.h',
         'common/chromeos/native_display_delegate_ozone.cc',
         'common/chromeos/native_display_delegate_ozone.h',
         'common/chromeos/touchscreen_device_manager_ozone.cc',
diff --git a/ui/ozone/platform/dri/chromeos/display_message_handler.cc b/ui/ozone/platform/dri/chromeos/display_message_handler.cc
new file mode 100644
index 0000000..5cfe2e0
--- /dev/null
+++ b/ui/ozone/platform/dri/chromeos/display_message_handler.cc
@@ -0,0 +1,95 @@
+// 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 "ui/ozone/platform/dri/chromeos/display_message_handler.h"
+
+#include "ui/display/types/chromeos/display_mode.h"
+#include "ui/display/types/chromeos/display_snapshot.h"
+#include "ui/ozone/common/chromeos/display_util.h"
+#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
+#include "ui/ozone/common/gpu/ozone_gpu_messages.h"
+#include "ui/ozone/platform/dri/chromeos/native_display_delegate_dri.h"
+
+namespace ui {
+
+DisplayMessageHandler::DisplayMessageHandler(
+    scoped_ptr<NativeDisplayDelegateDri> ndd)
+    : sender_(NULL),
+      ndd_(ndd.Pass()) {}
+
+DisplayMessageHandler::~DisplayMessageHandler() {}
+
+void DisplayMessageHandler::OnChannelEstablished(IPC::Sender* sender) {
+  sender_ = sender;
+}
+
+bool DisplayMessageHandler::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+
+  IPC_BEGIN_MESSAGE_MAP(DisplayMessageHandler, message)
+  IPC_MESSAGE_HANDLER(OzoneGpuMsg_ForceDPMSOn, OnForceDPMSOn)
+  IPC_MESSAGE_HANDLER(OzoneGpuMsg_RefreshNativeDisplays,
+                      OnRefreshNativeDisplays)
+  IPC_MESSAGE_HANDLER(OzoneGpuMsg_ConfigureNativeDisplay,
+                      OnConfigureNativeDisplay)
+  IPC_MESSAGE_HANDLER(OzoneGpuMsg_DisableNativeDisplay,
+                      OnDisableNativeDisplay)
+  IPC_MESSAGE_UNHANDLED(handled = false);
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+
+void DisplayMessageHandler::OnForceDPMSOn() {
+  ndd_->ForceDPMSOn();
+}
+
+void DisplayMessageHandler::OnRefreshNativeDisplays() {
+  std::vector<DisplaySnapshot_Params> displays;
+  std::vector<DisplaySnapshot*> native_displays = ndd_->GetDisplays();
+  for (size_t i = 0; i < native_displays.size(); ++i)
+    displays.push_back(GetDisplaySnapshotParams(*native_displays[i]));
+
+  sender_->Send(new OzoneHostMsg_UpdateNativeDisplays(displays));
+}
+
+void DisplayMessageHandler::OnConfigureNativeDisplay(
+    int64_t id,
+    const DisplayMode_Params& mode_param,
+    const gfx::Point& origin) {
+  DisplaySnapshot* display = ndd_->FindDisplaySnapshot(id);
+  if (!display) {
+    LOG(ERROR) << "There is no display with ID " << id;
+    return;
+  }
+
+  const DisplayMode* mode = NULL;
+  for (size_t i = 0; i < display->modes().size(); ++i) {
+    if (mode_param.size == display->modes()[i]->size() &&
+        mode_param.is_interlaced == display->modes()[i]->is_interlaced() &&
+        mode_param.refresh_rate == display->modes()[i]->refresh_rate()) {
+      mode = display->modes()[i];
+      break;
+    }
+  }
+
+  if (!mode) {
+    LOG(ERROR) << "Failed to find mode: size=" << mode_param.size.ToString()
+               << " is_interlaced=" << mode_param.is_interlaced
+               << " refresh_rate=" << mode_param.refresh_rate;
+    return;
+  }
+
+  ndd_->Configure(*display, mode, origin);
+}
+
+void DisplayMessageHandler::OnDisableNativeDisplay(int64_t id) {
+  DisplaySnapshot* display = ndd_->FindDisplaySnapshot(id);
+  if (display)
+    ndd_->Configure(*display, NULL, gfx::Point());
+  else
+    LOG(ERROR) << "There is no display with ID " << id;
+}
+
+}  // namespace ui
diff --git a/ui/ozone/platform/dri/chromeos/display_message_handler.h b/ui/ozone/platform/dri/chromeos/display_message_handler.h
new file mode 100644
index 0000000..4f67ca3
--- /dev/null
+++ b/ui/ozone/platform/dri/chromeos/display_message_handler.h
@@ -0,0 +1,49 @@
+// 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.
+
+#ifndef UI_OZONE_PLATFORM_DRI_CHROMEOS_DISPLAY_MESSAGE_HANDLER_H_
+#define UI_OZONE_PLATFORM_DRI_CHROMEOS_DISPLAY_MESSAGE_HANDLER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/ozone/public/gpu_platform_support.h"
+
+namespace gfx {
+class Point;
+}
+
+namespace ui {
+
+class NativeDisplayDelegateDri;
+
+struct DisplayMode_Params;
+struct DisplaySnapshot_Params;
+
+class DisplayMessageHandler : public GpuPlatformSupport {
+ public:
+  DisplayMessageHandler(scoped_ptr<NativeDisplayDelegateDri> ndd);
+  virtual ~DisplayMessageHandler();
+
+  // GpuPlatformSupport:
+  virtual void OnChannelEstablished(IPC::Sender* sender) OVERRIDE;
+
+  // IPC::Listener:
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+ private:
+  void OnForceDPMSOn();
+  void OnRefreshNativeDisplays();
+  void OnConfigureNativeDisplay(int64_t id,
+                                const DisplayMode_Params& mode,
+                                const gfx::Point& origin);
+  void OnDisableNativeDisplay(int64_t id);
+
+  IPC::Sender* sender_;
+  scoped_ptr<NativeDisplayDelegateDri> ndd_;
+
+  DISALLOW_COPY_AND_ASSIGN(DisplayMessageHandler);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRI_CHROMEOS_DISPLAY_MESSAGE_HANDLER_H_
diff --git a/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc b/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc
index f765cd3..fff9def 100644
--- a/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc
+++ b/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.cc
@@ -32,11 +32,21 @@ NativeDisplayDelegateDri::NativeDisplayDelegateDri(
 }
 
 NativeDisplayDelegateDri::~NativeDisplayDelegateDri() {
-  device_manager_->RemoveObserver(this);
+  if (device_manager_)
+    device_manager_->RemoveObserver(this);
+}
+
+DisplaySnapshot* NativeDisplayDelegateDri::FindDisplaySnapshot(int64_t id) {
+  for (size_t i = 0; i < cached_displays_.size(); ++i)
+    if (cached_displays_[i]->display_id() == id)
+      return cached_displays_[i];
+
+  return NULL;
 }
 
 void NativeDisplayDelegateDri::Initialize() {
-  device_manager_->AddObserver(this);
+  if (device_manager_)
+    device_manager_->AddObserver(this);
 
   ScopedVector<HardwareDisplayControllerInfo> displays =
       GetAvailableDisplayControllerInfos(dri_->get_fd());
diff --git a/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.h b/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.h
index 6723008..ef97014 100644
--- a/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.h
+++ b/ui/ozone/platform/dri/chromeos/native_display_delegate_dri.h
@@ -27,6 +27,8 @@ class NativeDisplayDelegateDri
                            DeviceManager* device_manager);
   virtual ~NativeDisplayDelegateDri();
 
+  DisplaySnapshot* FindDisplaySnapshot(int64_t id);
+
   // NativeDisplayDelegate overrides:
   virtual void Initialize() OVERRIDE;
   virtual void GrabServer() OVERRIDE;
diff --git a/ui/ozone/platform/dri/chromeos/native_display_delegate_proxy.cc b/ui/ozone/platform/dri/chromeos/native_display_delegate_proxy.cc
new file mode 100644
index 0000000..2219e4d
--- /dev/null
+++ b/ui/ozone/platform/dri/chromeos/native_display_delegate_proxy.cc
@@ -0,0 +1,153 @@
+// 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 "ui/ozone/platform/dri/chromeos/native_display_delegate_proxy.h"
+
+#include "base/logging.h"
+#include "ui/display/types/chromeos/display_snapshot.h"
+#include "ui/display/types/chromeos/native_display_observer.h"
+#include "ui/events/ozone/device/device_event.h"
+#include "ui/events/ozone/device/device_manager.h"
+#include "ui/ozone/common/chromeos/display_snapshot_proxy.h"
+#include "ui/ozone/common/chromeos/display_util.h"
+#include "ui/ozone/common/gpu/ozone_gpu_messages.h"
+#include "ui/ozone/platform/dri/gpu_platform_support_host_gbm.h"
+
+namespace ui {
+
+NativeDisplayDelegateProxy::NativeDisplayDelegateProxy(
+    GpuPlatformSupportHostGbm* proxy,
+    DeviceManager* device_manager)
+    : proxy_(proxy),
+      device_manager_(device_manager) {
+  proxy_->RegisterHandler(this);
+}
+
+NativeDisplayDelegateProxy::~NativeDisplayDelegateProxy() {
+  if (device_manager_)
+    device_manager_->RemoveObserver(this);
+
+  proxy_->UnregisterHandler(this);
+}
+
+void NativeDisplayDelegateProxy::Initialize() {
+  if (device_manager_)
+    device_manager_->AddObserver(this);
+}
+
+void NativeDisplayDelegateProxy::GrabServer() {}
+
+void NativeDisplayDelegateProxy::UngrabServer() {}
+
+void NativeDisplayDelegateProxy::SyncWithServer() {}
+
+void NativeDisplayDelegateProxy::SetBackgroundColor(uint32_t color_argb) {
+  NOTIMPLEMENTED();
+}
+
+void NativeDisplayDelegateProxy::ForceDPMSOn() {
+  proxy_->Send(new OzoneGpuMsg_ForceDPMSOn());
+}
+
+std::vector<DisplaySnapshot*> NativeDisplayDelegateProxy::GetDisplays() {
+  return displays_.get();
+}
+
+void NativeDisplayDelegateProxy::AddMode(const DisplaySnapshot& output,
+                                         const DisplayMode* mode) {}
+
+bool NativeDisplayDelegateProxy::Configure(const DisplaySnapshot& output,
+                                           const DisplayMode* mode,
+                                           const gfx::Point& origin) {
+  // TODO(dnicoara) Should handle an asynchronous response.
+  if (mode)
+    proxy_->Send(new OzoneGpuMsg_ConfigureNativeDisplay(
+        output.display_id(), GetDisplayModeParams(*mode), origin));
+  else
+    proxy_->Send(new OzoneGpuMsg_DisableNativeDisplay(output.display_id()));
+
+  return true;
+}
+
+void NativeDisplayDelegateProxy::CreateFrameBuffer(const gfx::Size& size) {}
+
+bool NativeDisplayDelegateProxy::GetHDCPState(const DisplaySnapshot& output,
+                                              HDCPState* state) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool NativeDisplayDelegateProxy::SetHDCPState(const DisplaySnapshot& output,
+                                              HDCPState state) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+std::vector<ColorCalibrationProfile>
+NativeDisplayDelegateProxy::GetAvailableColorCalibrationProfiles(
+    const DisplaySnapshot& output) {
+  NOTIMPLEMENTED();
+  return std::vector<ColorCalibrationProfile>();
+}
+
+bool NativeDisplayDelegateProxy::SetColorCalibrationProfile(
+    const DisplaySnapshot& output,
+    ColorCalibrationProfile new_profile) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+void NativeDisplayDelegateProxy::AddObserver(NativeDisplayObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void NativeDisplayDelegateProxy::RemoveObserver(
+    NativeDisplayObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void NativeDisplayDelegateProxy::OnDeviceEvent(const DeviceEvent& event) {
+  if (event.device_type() != DeviceEvent::DISPLAY)
+    return;
+
+  if (event.action_type() == DeviceEvent::CHANGE) {
+    VLOG(1) << "Got display changed event";
+    proxy_->Send(new OzoneGpuMsg_RefreshNativeDisplays());
+  }
+}
+
+void NativeDisplayDelegateProxy::OnChannelEstablished(
+    int host_id, IPC::Sender* sender) {
+  // Force an initial configure such that the browser process can get the actual
+  // state.
+  proxy_->Send(new OzoneGpuMsg_RefreshNativeDisplays());
+}
+
+void NativeDisplayDelegateProxy::OnChannelDestroyed(int host_id) {
+}
+
+bool NativeDisplayDelegateProxy::OnMessageReceived(
+    const IPC::Message& message) {
+  bool handled = true;
+
+  IPC_BEGIN_MESSAGE_MAP(NativeDisplayDelegateProxy, message)
+  IPC_MESSAGE_HANDLER(OzoneHostMsg_UpdateNativeDisplays,
+                      OnUpdateNativeDisplays)
+  IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+
+void NativeDisplayDelegateProxy::OnUpdateNativeDisplays(
+    const std::vector<DisplaySnapshot_Params>& displays) {
+  displays_.clear();
+  for (size_t i = 0; i < displays.size(); ++i)
+    displays_.push_back(new DisplaySnapshotProxy(displays[i]));
+
+  FOR_EACH_OBSERVER(
+      NativeDisplayObserver, observers_, OnConfigurationChanged());
+}
+
+}  // namespace ui
diff --git a/ui/ozone/platform/dri/chromeos/native_display_delegate_proxy.h b/ui/ozone/platform/dri/chromeos/native_display_delegate_proxy.h
new file mode 100644
index 0000000..19e5ff7
--- /dev/null
+++ b/ui/ozone/platform/dri/chromeos/native_display_delegate_proxy.h
@@ -0,0 +1,81 @@
+// 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.
+
+#ifndef UI_OZONE_PLATFORM_DRI_CHROMEOS_NATIVE_DISPLAY_DELEGATE_PROXY_H_
+#define UI_OZONE_PLATFORM_DRI_CHROMEOS_NATIVE_DISPLAY_DELEGATE_PROXY_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_vector.h"
+#include "base/observer_list.h"
+#include "ui/display/types/chromeos/native_display_delegate.h"
+#include "ui/events/ozone/device/device_event_observer.h"
+#include "ui/ozone/public/gpu_platform_support_host.h"
+
+namespace ui {
+
+class DeviceManager;
+class GpuPlatformSupportHostGbm;
+
+struct DisplaySnapshot_Params;
+
+class NativeDisplayDelegateProxy : public NativeDisplayDelegate,
+                                   public DeviceEventObserver,
+                                   public GpuPlatformSupportHost {
+ public:
+  NativeDisplayDelegateProxy(GpuPlatformSupportHostGbm* proxy,
+                             DeviceManager* device_manager);
+  virtual ~NativeDisplayDelegateProxy();
+
+  // NativeDisplayDelegate overrides:
+  virtual void Initialize() OVERRIDE;
+  virtual void GrabServer() OVERRIDE;
+  virtual void UngrabServer() OVERRIDE;
+  virtual void SyncWithServer() OVERRIDE;
+  virtual void SetBackgroundColor(uint32_t color_argb) OVERRIDE;
+  virtual void ForceDPMSOn() OVERRIDE;
+  virtual std::vector<DisplaySnapshot*> GetDisplays() OVERRIDE;
+  virtual void AddMode(const DisplaySnapshot& output,
+                       const DisplayMode* mode) OVERRIDE;
+  virtual bool Configure(const DisplaySnapshot& output,
+                         const DisplayMode* mode,
+                         const gfx::Point& origin) OVERRIDE;
+  virtual void CreateFrameBuffer(const gfx::Size& size) OVERRIDE;
+  virtual bool GetHDCPState(const DisplaySnapshot& output,
+                            HDCPState* state) OVERRIDE;
+  virtual bool SetHDCPState(const DisplaySnapshot& output,
+                            HDCPState state) OVERRIDE;
+  virtual std::vector<ColorCalibrationProfile>
+      GetAvailableColorCalibrationProfiles(
+          const DisplaySnapshot& output) OVERRIDE;
+  virtual bool SetColorCalibrationProfile(
+      const DisplaySnapshot& output,
+      ColorCalibrationProfile new_profile) OVERRIDE;
+  virtual void AddObserver(NativeDisplayObserver* observer) OVERRIDE;
+  virtual void RemoveObserver(NativeDisplayObserver* observer) OVERRIDE;
+
+  // DeviceEventObserver overrides:
+  virtual void OnDeviceEvent(const DeviceEvent& event) OVERRIDE;
+
+  // GpuPlatformSupportHost:
+  virtual void OnChannelEstablished(int host_id, IPC::Sender* sender) OVERRIDE;
+  virtual void OnChannelDestroyed(int host_id) OVERRIDE;
+
+  // IPC::Listener overrides:
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+ private:
+  void OnUpdateNativeDisplays(
+      const std::vector<DisplaySnapshot_Params>& displays);
+
+  GpuPlatformSupportHostGbm* proxy_;  // Not owned.
+  DeviceManager* device_manager_;  // Not owned.
+  ScopedVector<DisplaySnapshot> displays_;
+  ObserverList<NativeDisplayObserver> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeDisplayDelegateProxy);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRI_CHROMEOS_NATIVE_DISPLAY_DELEGATE_PROXY_H_
diff --git a/ui/ozone/platform/dri/gbm.gypi b/ui/ozone/platform/dri/gbm.gypi
index b73a8b2..1261bfa 100644
--- a/ui/ozone/platform/dri/gbm.gypi
+++ b/ui/ozone/platform/dri/gbm.gypi
@@ -31,6 +31,10 @@
       'sources': [
         'buffer_data.cc',
         'buffer_data.h',
+        'chromeos/display_message_handler.cc',
+        'chromeos/display_message_handler.h',
+        'chromeos/native_display_delegate_proxy.cc',
+        'chromeos/native_display_delegate_proxy.h',
         'gbm_buffer.cc',
         'gbm_buffer.h',
         'gbm_surface.cc',
diff --git a/ui/ozone/platform/dri/gpu_platform_support_gbm.cc b/ui/ozone/platform/dri/gpu_platform_support_gbm.cc
index 70c99f4..051538e 100644
--- a/ui/ozone/platform/dri/gpu_platform_support_gbm.cc
+++ b/ui/ozone/platform/dri/gpu_platform_support_gbm.cc
@@ -14,8 +14,17 @@ GpuPlatformSupportGbm::GpuPlatformSupportGbm(DriSurfaceFactory* dri)
     : sender_(NULL), dri_(dri) {
 }
 
+GpuPlatformSupportGbm::~GpuPlatformSupportGbm() {}
+
+void GpuPlatformSupportGbm::AddHandler(scoped_ptr<GpuPlatformSupport> handler) {
+  handlers_.push_back(handler.release());
+}
+
 void GpuPlatformSupportGbm::OnChannelEstablished(IPC::Sender* sender) {
   sender_ = sender;
+
+  for (size_t i = 0; i < handlers_.size(); ++i)
+    handlers_[i]->OnChannelEstablished(sender);
 }
 
 bool GpuPlatformSupportGbm::OnMessageReceived(const IPC::Message& message) {
@@ -27,7 +36,12 @@ bool GpuPlatformSupportGbm::OnMessageReceived(const IPC::Message& message) {
   IPC_MESSAGE_UNHANDLED(handled = false);
   IPC_END_MESSAGE_MAP()
 
-  return handled;
+  if (!handled)
+    for (size_t i = 0; i < handlers_.size(); ++i)
+      if (handlers_[i]->OnMessageReceived(message))
+        return true;
+
+  return false;
 }
 
 void GpuPlatformSupportGbm::OnCursorSet(gfx::AcceleratedWidget widget,
diff --git a/ui/ozone/platform/dri/gpu_platform_support_gbm.h b/ui/ozone/platform/dri/gpu_platform_support_gbm.h
index 28066d43..ce547e4 100644
--- a/ui/ozone/platform/dri/gpu_platform_support_gbm.h
+++ b/ui/ozone/platform/dri/gpu_platform_support_gbm.h
@@ -5,6 +5,8 @@
 #ifndef UI_OZONE_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_GBM_H_
 #define UI_OZONE_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_GBM_H_
 
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/ozone/public/gpu_platform_support.h"
 
@@ -21,6 +23,9 @@ class DriSurfaceFactory;
 class GpuPlatformSupportGbm : public GpuPlatformSupport {
  public:
   GpuPlatformSupportGbm(DriSurfaceFactory* dri);
+  virtual ~GpuPlatformSupportGbm();
+
+  void AddHandler(scoped_ptr<GpuPlatformSupport> handler);
 
   // GpuPlatformSupport:
   virtual void OnChannelEstablished(IPC::Sender* sender) OVERRIDE;
@@ -37,6 +42,7 @@ class GpuPlatformSupportGbm : public GpuPlatformSupport {
   void OnCursorMove(gfx::AcceleratedWidget widget, const gfx::Point& location);
 
   DriSurfaceFactory* dri_;
+  ScopedVector<GpuPlatformSupport> handlers_;
 };
 
 }  // namespace ui
diff --git a/ui/ozone/platform/dri/gpu_platform_support_host_gbm.cc b/ui/ozone/platform/dri/gpu_platform_support_host_gbm.cc
index 39478bd..4f0394a 100644
--- a/ui/ozone/platform/dri/gpu_platform_support_host_gbm.cc
+++ b/ui/ozone/platform/dri/gpu_platform_support_host_gbm.cc
@@ -4,6 +4,7 @@
 
 #include "ui/ozone/platform/dri/gpu_platform_support_host_gbm.h"
 
+#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
 #include "ui/ozone/common/gpu/ozone_gpu_messages.h"
 
 namespace ui {
@@ -12,10 +13,28 @@ GpuPlatformSupportHostGbm::GpuPlatformSupportHostGbm()
     : host_id_(-1), sender_(NULL) {
 }
 
+GpuPlatformSupportHostGbm::~GpuPlatformSupportHostGbm() {}
+
+void GpuPlatformSupportHostGbm::RegisterHandler(
+    GpuPlatformSupportHost* handler) {
+  handlers_.push_back(handler);
+}
+
+void GpuPlatformSupportHostGbm::UnregisterHandler(
+    GpuPlatformSupportHost* handler) {
+  std::vector<GpuPlatformSupportHost*>::iterator it =
+      std::find(handlers_.begin(), handlers_.end(), handler);
+  if (it != handlers_.end())
+    handlers_.erase(it);
+}
+
 void GpuPlatformSupportHostGbm::OnChannelEstablished(int host_id,
                                                      IPC::Sender* sender) {
   host_id_ = host_id;
   sender_ = sender;
+
+  for (size_t i = 0; i < handlers_.size(); ++i)
+    handlers_[i]->OnChannelEstablished(host_id, sender);
 }
 
 void GpuPlatformSupportHostGbm::OnChannelDestroyed(int host_id) {
@@ -23,9 +42,23 @@ void GpuPlatformSupportHostGbm::OnChannelDestroyed(int host_id) {
     host_id_ = -1;
     sender_ = NULL;
   }
+
+  for (size_t i = 0; i < handlers_.size(); ++i)
+    handlers_[i]->OnChannelDestroyed(host_id);
 }
 
 bool GpuPlatformSupportHostGbm::OnMessageReceived(const IPC::Message& message) {
+  for (size_t i = 0; i < handlers_.size(); ++i)
+    if (handlers_[i]->OnMessageReceived(message))
+      return true;
+
+  return false;
+}
+
+bool GpuPlatformSupportHostGbm::Send(IPC::Message* message) {
+  if (sender_)
+    return sender_->Send(message);
+
   return false;
 }
 
diff --git a/ui/ozone/platform/dri/gpu_platform_support_host_gbm.h b/ui/ozone/platform/dri/gpu_platform_support_host_gbm.h
index 6463413..6f60b9e 100644
--- a/ui/ozone/platform/dri/gpu_platform_support_host_gbm.h
+++ b/ui/ozone/platform/dri/gpu_platform_support_host_gbm.h
@@ -5,6 +5,8 @@
 #ifndef UI_OZONE_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_HOST_GBM_H_
 #define UI_OZONE_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_HOST_GBM_H_
 
+#include <vector>
+
 #include "ui/gfx/native_widget_types.h"
 #include "ui/ozone/platform/dri/hardware_cursor_delegate.h"
 #include "ui/ozone/public/gpu_platform_support_host.h"
@@ -18,9 +20,14 @@ class Point;
 namespace ui {
 
 class GpuPlatformSupportHostGbm : public GpuPlatformSupportHost,
-                                  public HardwareCursorDelegate {
+                                  public HardwareCursorDelegate,
+                                  public IPC::Sender {
  public:
   GpuPlatformSupportHostGbm();
+  virtual ~GpuPlatformSupportHostGbm();
+
+  void RegisterHandler(GpuPlatformSupportHost* handler);
+  void UnregisterHandler(GpuPlatformSupportHost* handler);
 
   // GpuPlatformSupportHost:
   virtual void OnChannelEstablished(int host_id, IPC::Sender* sender) OVERRIDE;
@@ -29,6 +36,9 @@ class GpuPlatformSupportHostGbm : public GpuPlatformSupportHost,
   // IPC::Listener:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
+  // IPC::Sender:
+  virtual bool Send(IPC::Message* message) OVERRIDE;
+
   // HardwareCursorDelegate:
   virtual void SetHardwareCursor(gfx::AcceleratedWidget widget,
                                  const SkBitmap& bitmap,
@@ -39,6 +49,7 @@ class GpuPlatformSupportHostGbm : public GpuPlatformSupportHost,
  private:
   int host_id_;
   IPC::Sender* sender_;
+  std::vector<GpuPlatformSupportHost*> handlers_;
 };
 
 }  // namespace ui
diff --git a/ui/ozone/platform/dri/ozone_platform_gbm.cc b/ui/ozone/platform/dri/ozone_platform_gbm.cc
index 1ffd179..e80cb79e 100644
--- a/ui/ozone/platform/dri/ozone_platform_gbm.cc
+++ b/ui/ozone/platform/dri/ozone_platform_gbm.cc
@@ -26,8 +26,10 @@
 #include "ui/ozone/public/gpu_platform_support_host.h"
 
 #if defined(OS_CHROMEOS)
-#include "ui/ozone/common/chromeos/native_display_delegate_ozone.h"
 #include "ui/ozone/common/chromeos/touchscreen_device_manager_ozone.h"
+#include "ui/ozone/platform/dri/chromeos/display_message_handler.h"
+#include "ui/ozone/platform/dri/chromeos/native_display_delegate_dri.h"
+#include "ui/ozone/platform/dri/chromeos/native_display_delegate_proxy.h"
 #endif
 
 namespace ui {
@@ -92,7 +94,8 @@ class OzonePlatformGbm : public OzonePlatform {
 #if defined(OS_CHROMEOS)
   virtual scoped_ptr<NativeDisplayDelegate> CreateNativeDisplayDelegate()
       OVERRIDE {
-    return scoped_ptr<NativeDisplayDelegate>(new NativeDisplayDelegateOzone());
+    return scoped_ptr<NativeDisplayDelegate>(new NativeDisplayDelegateProxy(
+        gpu_platform_support_host_.get(), device_manager_.get()));
   }
   virtual scoped_ptr<TouchscreenDeviceManager>
       CreateTouchscreenDeviceManager() OVERRIDE {
@@ -128,6 +131,14 @@ class OzonePlatformGbm : public OzonePlatform {
 
     gpu_platform_support_.reset(
         new GpuPlatformSupportGbm(surface_factory_ozone_.get()));
+#if defined(OS_CHROMEOS)
+    gpu_platform_support_->AddHandler(scoped_ptr<GpuPlatformSupport>(
+        new DisplayMessageHandler(
+            scoped_ptr<NativeDisplayDelegateDri>(new NativeDisplayDelegateDri(
+                dri_.get(),
+                screen_manager_.get(),
+                NULL)))));
+#endif
   }
 
  private: