Check for the default search engine being null before using.

chrome/browser/search_engines/template_url_service_android.cc

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/search_engines/template_url_service_android.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_string.h"
 #include "base/bind.h"
@@ skipping 73 matching lines @@
     const JavaParamRef<jobject>& obj) const {
   return template_url_service_->loaded();
 }
 
 jint TemplateUrlServiceAndroid::GetTemplateUrlCount(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj) const {
   return template_urls_.size();
 }
 
-jboolean TemplateUrlServiceAndroid::IsSearchProviderManaged(
+jboolean TemplateUrlServiceAndroid::IsDefaultSearchManaged(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj) {
   return template_url_service_->is_default_search_managed();
 }
 
 jboolean TemplateUrlServiceAndroid::IsSearchByImageAvailable(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj) {
   const TemplateURL* default_search_provider =
       template_url_service_->GetDefaultSearchProvider();
@@ skipping 256 matching lines @@
 static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   TemplateUrlServiceAndroid* template_url_service_android =
       new TemplateUrlServiceAndroid(env, obj);
   return reinterpret_cast<intptr_t>(template_url_service_android);
 }
 
 // static
 bool TemplateUrlServiceAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }