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

android_webview/native/aw_contents.cc

Index: android_webview/native/aw_contents.cc
diff --git a/android_webview/native/aw_contents.cc b/android_webview/native/aw_contents.cc
index 6d2db78021772ce6a6f898f1bcf63ba0d4636ff6..b1b53eeb1c515fdc1a35a656d778799e8615a8fb 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -628,7 +628,8 @@ jint AwContents::ReleasePopupWebContents(JNIEnv* env, jobject obj) {
 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,
@@ -637,6 +638,14 @@ gfx::Point AwContents::GetLocationOnScreen() {
   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();