[android_webview] Use auto-sizing for webviews in wrap content mode.

android_webview/native/aw_contents.h

Index: android_webview/native/aw_contents.h
diff --git a/android_webview/native/aw_contents.h b/android_webview/native/aw_contents.h
index 272f0aebc2c0309d41f463ca8d0d744cc70afd27..287d6f7670f750f8664455f68e793aa4de37c046 100644
--- a/android_webview/native/aw_contents.h
+++ b/android_webview/native/aw_contents.h
@@ -164,10 +164,14 @@ class AwContents : public FindHelper::Listener,
   jint ReleasePopupAwContents(JNIEnv* env, jobject obj);
 
   void ScrollTo(JNIEnv* env, jobject obj, jint xPix, jint yPix);
-  void SetDipScale(JNIEnv* env, jobject obj, jfloat dipScale);
+  void SetDipScale(JNIEnv* env, jobject obj, jfloat dip_scale);
   void SetDisplayedPageScaleFactor(JNIEnv* env,
                                    jobject obj,
-                                   jfloat pageScaleFactor);
+                                   jfloat page_scale_factor);
+  void SetAutoResizeMode(JNIEnv* env,
+                         jobject obj,
+                         jboolean enabled,
+                         jint width_dip);
 
   void SetSaveFormData(bool enabled);