Make WebView work for external displays (over Presentations).

ui/android/window_android.cc

Index: ui/android/window_android.cc
diff --git a/ui/android/window_android.cc b/ui/android/window_android.cc
index 5f5b9731aee2d8ab73e22abf28a24314a98dd73f..a6abd3dff0ab4a78d54628c9fd2e57af107f71de 100644
--- a/ui/android/window_android.cc
+++ b/ui/android/window_android.cc
@@ -130,6 +130,23 @@ bool WindowAndroid::CanRequestPermission(const std::string& permission) {
       base::android::ConvertUTF8ToJavaString(env, permission).obj());
 }
 
+const gfx::DeviceDisplayInfo& WindowAndroid::GetDeviceDisplayInfo() {
+  if (!device_display_info_) {
+    UpdateDeviceDisplayInfo();
+  }
+  return *device_display_info_;
+}
+
+void WindowAndroid::UpdateDeviceDisplayInfo() {
+  device_display_info_ = scoped_ptr<gfx::DeviceDisplayInfo>(
+      new gfx::DeviceDisplayInfo(GetJavaContext()));
+}
+
+base::android::ScopedJavaLocalRef<jobject> WindowAndroid::GetJavaContext() {
+  JNIEnv* env = AttachCurrentThread();
+  return Java_WindowAndroid_getDisplayContext(env, GetJavaObject().obj());
+}
+
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------