Make WebView work for external displays (over Presentations).

ui/android/window_android.h

 // Copyright 2013 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_ANDROID_WINDOW_ANDROID_H_
 #define UI_ANDROID_WINDOW_ANDROID_H_
 
 #include <jni.h>
 #include <string>
 #include <vector>
 
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "ui/android/ui_android_export.h"
+#include "ui/gfx/android/device_display_info.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 
 namespace ui {
 
 class WindowAndroidCompositor;
 class WindowAndroidObserver;
 
 // Android implementation of the activity window.
 class UI_ANDROID_EXPORT WindowAndroid {
  public:
@@ skipping 35 matching lines @@
                jlong period_micros);
   void Animate(base::TimeTicks begin_frame_time);
   void OnActivityPaused(JNIEnv* env, jobject obj);
   void OnActivityResumed(JNIEnv* env, jobject obj);
 
   // Return whether the specified Android permission is granted.
   bool HasPermission(const std::string& permission);
   // Return whether the specified Android permission can be requested by Chrome.
   bool CanRequestPermission(const std::string& permission);
 
+  const gfx::DeviceDisplayInfo& GetDeviceDisplayInfo();
+  void UpdateDeviceDisplayInfo();
+
+  base::android::ScopedJavaLocalRef<jobject> GetJavaDisplayContext();
+
  private:
   ~WindowAndroid();
 
   base::android::ScopedJavaGlobalRef<jobject> java_window_;
   gfx::Vector2dF content_offset_;
   WindowAndroidCompositor* compositor_;
 
   base::ObserverList<WindowAndroidObserver> observer_list_;
+  scoped_ptr<gfx::DeviceDisplayInfo> device_display_info_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowAndroid);
 };
 
 }  // namespace ui
 
 #endif  // UI_ANDROID_WINDOW_ANDROID_H_