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

android_webview/native/aw_contents.cc

 // Copyright 2012 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.
 
 #include "android_webview/native/aw_contents.h"
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_browser_main_parts.h"
 #include "android_webview/browser/browser_view_renderer_impl.h"
 #include "android_webview/browser/gpu_memory_buffer_impl.h"
@@ skipping 610 matching lines @@
   web_contents_->FocusThroughTabTraversal(false);
 }
 
 jint AwContents::ReleasePopupWebContents(JNIEnv* env, jobject obj) {
   return reinterpret_cast<jint>(pending_contents_.release());
 }
 
 gfx::Point AwContents::GetLocationOnScreen() {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
-  if (obj.is_null()) return gfx::Point();
+  if (obj.is_null())
+    return gfx::Point();
   std::vector<int> location;
   base::android::JavaIntArrayToIntVector(
       env,
       Java_AwContents_getLocationOnScreen(env, obj.obj()).obj(),
       &location);
   return gfx::Point(location[0], location[1]);
 }
 
+void AwContents::OnPageScaleFactorChanged(float page_scale_factor) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return;
+  Java_AwContents_onPageScaleFactorChanged(env, obj.obj(), page_scale_factor);
+}
+
 ScopedJavaLocalRef<jobject> AwContents::CapturePicture(JNIEnv* env,
                                                        jobject obj) {
   return browser_view_renderer_->CapturePicture();
 }
 
 void AwContents::EnableOnNewPicture(JNIEnv* env,
                                     jobject obj,
                                     jboolean enabled,
                                     jboolean invalidation_only) {
   BrowserViewRenderer::OnNewPictureMode mode =
       BrowserViewRenderer::kOnNewPictureDisabled;
   if (enabled) {
     mode = invalidation_only ?
         BrowserViewRenderer::kOnNewPictureInvalidationOnly :
         BrowserViewRenderer::kOnNewPictureEnabled;
   }
 
   browser_view_renderer_->EnableOnNewPicture(mode);
 }
 
 }  // namespace android_webview