Add WebContents accessor in ContentViewCore interface.

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 0c38fb1251c591354c2f4c5f6b8eac8c301e273a..a1c43b2281a4edb9d32303c2889310cfd8769fdd 100644
--- a/content/public/browser/android/content_view_core.h
+++ b/content/public/browser/android/content_view_core.h
@@ -17,8 +17,6 @@ class WebContents;
 // communicating with the native Chromium code on Android.  This is a
 // public interface used by native code outside of the content module.
 //
-// TODO(jrg): this is a shell.  Upstream the rest.
-//
 // TODO(jrg): downstream, this class derives from
 // base::SupportsWeakPtr<ContentViewCore>.  Issues raised in
 // http://codereview.chromium.org/10536066/ make us want to rethink
@@ -46,7 +44,7 @@ class ContentViewCore {
   // --------------------------------------------------------------------------
   // Methods called from native code
   // --------------------------------------------------------------------------
-
+  virtual content::WebContents* web_contents() const = 0;
   virtual base::android::ScopedJavaLocalRef<jobject> GetJavaObject() = 0;
 
  protected:
@@ -55,4 +53,4 @@ class ContentViewCore {
 
 };  // namespace content
 
-#endif  // CONTENT_PUBLIC_BROWSER_CONTENT_VIEW_CORE_H_
+#endif  // CONTENT_PUBLIC_BROWSER_ANDROID_CONTENT_VIEW_CORE_H_