Add context_utils.h includes where needed.

chrome/browser/android/net/external_estimate_provider_android.cc

 // 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.
 
 #include "chrome/browser/android/net/external_estimate_provider_android.h"
 
 #include <stdint.h>
 
+#include "base/android/context_utils.h"
 #include "base/message_loop/message_loop.h"
 #include "content/public/browser/browser_thread.h"
 #include "jni/ExternalEstimateProviderAndroid_jni.h"
 
 namespace chrome {
 namespace android {
 
 ExternalEstimateProviderAndroid::ExternalEstimateProviderAndroid()
     : task_runner_(nullptr), delegate_(nullptr), weak_factory_(this) {
   if (base::MessageLoop::current())
@@ skipping 103 matching lines @@
   if (delegate_)
     delegate_->OnUpdatedEstimateAvailable();
 }
 
 bool RegisterExternalEstimateProviderAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome