Make WebView work for external displays (over Presentations).

ui/gfx/android/shared_device_display_info.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_GFX_ANDROID_SHARED_DEVICE_DISPLAY_INFO_H_
-#define UI_GFX_ANDROID_SHARED_DEVICE_DISPLAY_INFO_H_
-
-#include "base/android/scoped_java_ref.h"
-#include "base/basictypes.h"
-#include "base/memory/singleton.h"
-#include "base/synchronization/lock.h"
-
-namespace gfx {
-
-// Facilitates access to device information typically only
-// available using the Android SDK, including Display properties.
-class SharedDeviceDisplayInfo {
- public:
-  static SharedDeviceDisplayInfo* GetInstance();
-
-  // See documentation in DeviceDisplayInfo.java
-  int GetDisplayHeight();
-  int GetDisplayWidth();
-  int GetPhysicalDisplayHeight();
-  int GetPhysicalDisplayWidth();
-  int GetBitsPerPixel();
-  int GetBitsPerComponent();
-  double GetDIPScale();
-  int GetSmallestDIPWidth();
-  int GetRotationDegrees();
-
-  // Registers methods with JNI and returns true if succeeded.
-  static bool RegisterSharedDeviceDisplayInfo(JNIEnv* env);
-
-  void InvokeUpdate(JNIEnv* env,
-                    jobject jobj,
-                    jint display_height,
-                    jint display_width,
-                    jint physical_display_height,
-                    jint physical_display_width,
-                    jint bits_per_pixel,
-                    jint bits_per_component,
-                    jdouble dip_scale,
-                    jint smallest_dip_width,
-                    jint rotation_degrees);
- private:
-  friend struct DefaultSingletonTraits<SharedDeviceDisplayInfo>;
-
-  SharedDeviceDisplayInfo();
-  ~SharedDeviceDisplayInfo();
-  void UpdateDisplayInfo(JNIEnv* env,
-                         jobject jobj,
-                         jint display_height,
-                         jint display_width,
-                         jint physical_display_height,
-                         jint physical_display_width,
-                         jint bits_per_pixel,
-                         jint bits_per_component,
-                         jdouble dip_scale,
-                         jint smallest_dip_width,
-                         jint rotation_degrees);
-
-  base::Lock lock_;
-  base::android::ScopedJavaGlobalRef<jobject> j_device_info_;
-
-  int display_height_;
-  int display_width_;
-  int physical_display_height_;
-  int physical_display_width_;
-  int bits_per_pixel_;
-  int bits_per_component_;
-  double dip_scale_;
-  int smallest_dip_width_;
-  int rotation_degrees_;
-
-  DISALLOW_COPY_AND_ASSIGN(SharedDeviceDisplayInfo);
-};
-
-}  // namespace gfx
-
-#endif // UI_GFX_ANDROID_SHARED_DEVICE_DISPLAY_INFO_H_