Move ContentViewCore native ownership to WebContents

content/public/browser/android/content_view_core.h

Index: content/public/browser/android/content_view_core.h
diff --git a/content/public/browser/android/content_view_core.h b/content/public/browser/android/content_view_core.h
index f0b439b2507ea71d40882d604d490de972a3efcd..605813bae22f36d1af4145e171d5adb17d46f287 100644
--- a/content/public/browser/android/content_view_core.h
+++ b/content/public/browser/android/content_view_core.h
@@ -22,11 +22,10 @@ class WebContents;
 // public interface used by native code outside of the content module.
 class ContentViewCore {
  public:
-  static ContentViewCore* Create(
-      JNIEnv* env, jobject obj, WebContents* web_contents);
+  // Returns the existing ContentViewCore for |web_contents|, or NULL.
+  static ContentViewCore* FromWebContents(WebContents* web_contents);
   static ContentViewCore* GetNativeContentViewCore(JNIEnv* env, jobject obj);
 
-  virtual void Destroy(JNIEnv* env, jobject obj) = 0;
   virtual WebContents* GetWebContents() const = 0;
   virtual base::android::ScopedJavaLocalRef<jobject> GetJavaObject() = 0;
   virtual ui::WindowAndroid* GetWindowAndroid() = 0;