Add DeviceDisplayInfo getter in WindowAndroid.

ui/android/window_android.h

Index: ui/android/window_android.h
diff --git a/ui/android/window_android.h b/ui/android/window_android.h
index 258afcd355fbf43d332426a29d5439b5d2ea700b..9b74cf1c7518740614ec89c030c5753045f5877f 100644
--- a/ui/android/window_android.h
+++ b/ui/android/window_android.h
@@ -17,6 +17,10 @@
 #include "ui/android/ui_android_export.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 
+namespace gfx {
+class DeviceDisplayInfo;
+}
+
 namespace ui {
 
 class WindowAndroidCompositor;
@@ -76,6 +80,8 @@ class UI_ANDROID_EXPORT WindowAndroid {
 
   static WindowAndroid* createForTesting();
 
+  const gfx::DeviceDisplayInfo& GetDeviceDisplayInfo() const;
+
  private:
   ~WindowAndroid();
 
@@ -84,6 +90,8 @@ class UI_ANDROID_EXPORT WindowAndroid {
   WindowAndroidCompositor* compositor_;
 
   base::ObserverList<WindowAndroidObserver> observer_list_;
+  // TODO(gsennton): Update display info on screen orientation updates.
+  const scoped_ptr<gfx::DeviceDisplayInfo> device_display_info_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowAndroid);
 };