Remove "Search by Image" feature on Chrome for Android.

chrome/browser/android/tab_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 CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/jni_weak_ref.h"
@@ skipping 183 matching lines @@
       content::WebContents* web_contents);
 
   void UpdateTopControlsState(JNIEnv* env,
                               jobject obj,
                               jint constraints,
                               jint current,
                               jboolean animate);
 
   void LoadOriginalImage(JNIEnv* env, jobject obj);
 
-  void SearchByImageInNewTabAsync(JNIEnv* env, jobject obj);
-
   jlong GetBookmarkId(JNIEnv* env, jobject obj, jboolean only_editable);
 
   jboolean HasOfflineCopy(JNIEnv* env, jobject obj);
 
   jboolean IsOfflinePage(JNIEnv* env, jobject obj);
 
   base::android::ScopedJavaLocalRef<jstring> GetOfflinePageOriginalUrl(
       JNIEnv* env,
       jobject obj);
 
@@ skipping 41 matching lines @@
   scoped_ptr<content::WebContents> web_contents_;
   scoped_ptr<chrome::android::TabWebContentsDelegateAndroid>
       web_contents_delegate_;
 
   scoped_ptr<browser_sync::SyncedTabDelegateAndroid> synced_tab_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TabAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_ANDROID_H_