Add OnDisplayMetricsChanged in DisplayObserver.

media/video/capture/linux/video_capture_device_chromeos.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 "media/video/capture/linux/video_capture_device_chromeos.h"
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "ui/gfx/display.h"
@@ skipping 27 matching lines @@
         base::Bind(&ScreenObserverDelegate::RemoveObserverOnUIThread, this));
   }
 
  private:
   friend class base::RefCountedThreadSafe<ScreenObserverDelegate>;
 
   virtual ~ScreenObserverDelegate() {
     DCHECK(!capture_device_);
   }
 
-  // gfx::DisplayObserver:
-  virtual void OnDisplayBoundsChanged(const gfx::Display& display) OVERRIDE {
-    SendDisplayRotation(display);
-  }
-
   virtual void OnDisplayAdded(const gfx::Display& /*new_display*/) OVERRIDE {}
   virtual void OnDisplayRemoved(const gfx::Display& /*old_display*/) OVERRIDE {}
+  virtual void OnDisplayMetricsChanged(
+      const gfx::Display& display,
+      gfx::DisplayObserver::DisplayMetrics metrics) OVERRIDE {
+    if (!(metrics & DISPLAY_METRIC_ROTATION))
+      return;
+    SendDisplayRotation(display);
+  }
 
   void AddObserverOnUIThread() {
     DCHECK(ui_task_runner_->BelongsToCurrentThread());
     gfx::Screen* screen =
         gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_ALTERNATE);
     if (screen) {
       screen->AddObserver(this);
       SendDisplayRotation(screen->GetPrimaryDisplay());
     }
   }
@@ skipping 38 matching lines @@
   screen_observer_delegate_->RemoveObserver();
 }
 
 void VideoCaptureDeviceChromeOS::SetDisplayRotation(
     const gfx::Display& display) {
   if (display.IsInternal())
     SetRotation(display.rotation() * 90);
 }
 
 }  // namespace media