Remove page IDs from three WebContentsObserver APIs that don't need it.

content/browser/android/web_contents_observer_android.h

 // Copyright (c) 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_WEB_CONTENTS_OBSERVER_ANDROID_H_
 #define CONTENT_BROWSER_ANDROID_WEB_CONTENTS_OBSERVER_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/jni_weak_ref.h"
@@ skipping 36 matching lines @@
   virtual void DidFailLoad(int64 frame_id,
                            const GURL& validated_url,
                            bool is_main_frame,
                            int error_code,
                            const base::string16& error_description,
                            RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidNavigateMainFrame(const LoadCommittedDetails& details,
                                     const FrameNavigateParams& params) OVERRIDE;
   virtual void DidNavigateAnyFrame(const LoadCommittedDetails& details,
                                    const FrameNavigateParams& params) OVERRIDE;
-  virtual void DidFirstVisuallyNonEmptyPaint(int32 page_id) OVERRIDE;
+  virtual void DidFirstVisuallyNonEmptyPaint() OVERRIDE;
   virtual void DidStartProvisionalLoadForFrame(
       int64 frame_id,
       int64 parent_frame_id,
       bool is_main_frame,
       const GURL& validated_url,
       bool is_error_page,
       bool is_iframe_srcdoc,
       RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidCommitProvisionalLoadForFrame(
       int64 frame_id,
@@ skipping 21 matching lines @@
 
   JavaObjectWeakGlobalRef weak_java_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserverAndroid);
 };
 
 bool RegisterWebContentsObserverAndroid(JNIEnv* env);
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_WEB_CONTENTS_OBSERVER_ANDROID_H_