Store physical backing size in ViewAndroid

chrome/browser/android/vr_shell/vr_shell.h

 // Copyright 2016 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 CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_
 
 #include <jni.h>
 
 #include <memory>
@@ skipping 113 matching lines @@
 
   void ContentWebContentsDestroyed();
   // Called when our WebContents have been hidden. Usually a sign that something
   // like another tab placed in front of it.
   void ContentWasHidden();
   void ContentWasShown();
 
   void ContentSurfaceChanged(jobject surface);
   void GvrDelegateReady();
 
+  void OnPhysicalBackingSizeChanged(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      const base::android::JavaParamRef<jobject>& jweb_contents,
+      jint width,
+      jint height);
   void ContentPhysicalBoundsChanged(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& object,
       jint width,
       jint height,
       jfloat dpr);
 
   // Perform a UI action triggered by the javascript API.
   void DoUiAction(const UiAction action,
                   const base::DictionaryValue* arguments);
@@ skipping 77 matching lines @@
   base::WeakPtrFactory<VrShell> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VrShell);
 };
 
 bool RegisterVrShell(JNIEnv* env);
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_