Add support for ContentViewCore helpers on Tab

content/browser/android/content_view_core_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_
 #define CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_
 
 #include <vector>
 
 #include "base/android/jni_android.h"
@@ skipping 162 matching lines @@
   void SetAccessibilityEnabled(JNIEnv* env, jobject obj, bool enabled);
 
   void ExtractSmartClipData(JNIEnv* env,
                             jobject obj,
                             jint x,
                             jint y,
                             jint width,
                             jint height);
 
   void SetBackgroundOpaque(JNIEnv* env, jobject jobj, jboolean opaque);
+  void SetDrawsContent(JNIEnv* env, jobject jobj, jboolean draws);
 
   jint GetCurrentRenderProcessId(JNIEnv* env, jobject obj);
 
   // --------------------------------------------------------------------------
   // Public methods that call to Java via JNI
   // --------------------------------------------------------------------------
 
   void OnSmartClipDataExtracted(const base::string16& text,
                                 const base::string16& html,
                                 const gfx::Rect& clip_rect);
@@ skipping 154 matching lines @@
   scoped_refptr<GinJavaBridgeDispatcherHost> java_bridge_dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentViewCoreImpl);
 };
 
 bool RegisterContentViewCore(JNIEnv* env);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_