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 58f1e280bd6a9639ac9368cce647ed9a1ef2c86b..847c88c2155ccc9e240049ad2c3ec4962def2aad 100644
--- a/ui/android/window_android.h
+++ b/ui/android/window_android.h
@@ -16,6 +16,10 @@
 #include "ui/android/ui_android_export.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 
+namespace gfx {
+class DeviceDisplayInfo;
+}
+
 namespace ui {
 
 class WindowAndroidCompositor;
@@ -69,6 +73,8 @@ class UI_ANDROID_EXPORT WindowAndroid {
   // Return whether the specified Android permission can be requested by Chrome.
   bool CanRequestPermission(const std::string& permission);
 
+  const gfx::DeviceDisplayInfo& GetDeviceDisplayInfo();
+
  private:
   ~WindowAndroid();
 
@@ -77,6 +83,8 @@ class UI_ANDROID_EXPORT WindowAndroid {
   WindowAndroidCompositor* compositor_;
 
   base::ObserverList<WindowAndroidObserver> observer_list_;
+  // TODO(gsennton) Update display info on screen orientation updates.
+  scoped_ptr<gfx::DeviceDisplayInfo> device_display_info_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowAndroid);
 };