Fix IWYU violators that don't include scoped_ptr.h in Android build.

chrome/browser/android/contextualsearch/contextual_search_tab_helper.h

 // Copyright 2015 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_CONTEXTUALSEARCH_CONTEXTUAL_SEARCH_TAB_HELPER_H_
 #define CHROME_BROWSER_ANDROID_CONTEXTUALSEARCH_CONTEXTUAL_SEARCH_TAB_HELPER_H_
 
 #include <jni.h>
 
 #include "base/android/jni_weak_ref.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "components/prefs/pref_change_registrar.h"
 
 class Profile;
 
 class ContextualSearchTabHelper {
  public:
   ContextualSearchTabHelper(JNIEnv* env, jobject obj, Profile* profile);
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
  private:
   ~ContextualSearchTabHelper();
   void OnContextualSearchPrefChanged();
 
   JavaObjectWeakGlobalRef weak_java_ref_;
   scoped_ptr<PrefChangeRegistrar> pref_change_registrar_;
   base::WeakPtrFactory<ContextualSearchTabHelper> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(ContextualSearchTabHelper);
 };
 
 bool RegisterContextualSearchTabHelper(JNIEnv* env);
 
 #endif  // CHROME_BROWSER_ANDROID_CONTEXTUALSEARCH_CONTEXTUAL_SEARCH_TAB_HELPER_H_