[android] Resize the android_webview if it's 0x0 initially.

android_webview/browser/browser_view_renderer.h

 // Copyright (c) 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 ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
 #define ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/rect.h"
@@ skipping 21 matching lines @@
      virtual void Invalidate() = 0;
 
      // Called when a new Picture is available. Needs to be enabled
      // via the EnableOnNewPicture method.
      virtual void OnNewPicture(
          const base::android::JavaRef<jobject>& picture) = 0;
 
      // Called to get view's absolute location on the screen.
      virtual gfx::Point GetLocationOnScreen() = 0;
 
+     // Called when the RenderView page scale changes.
+     virtual void OnPageScaleFactorChanged(float page_scale_factor) = 0;
+
    protected:
      virtual ~Client() {}
   };
 
   // Delegate to perform rendering actions involving Java objects.
   class JavaHelper {
    public:
     // Creates a RGBA_8888 Java Bitmap object of the requested size.
     virtual base::android::ScopedJavaLocalRef<jobject> CreateBitmap(
         JNIEnv* env,
@@ skipping 45 matching lines @@
   virtual bool IsAttachedToWindow() = 0;
   virtual bool IsViewVisible() = 0;
   virtual gfx::Rect GetScreenRect() = 0;
 
   virtual ~BrowserViewRenderer() {}
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_