Creating the NTP snippet service.

ios/chrome/browser/ntp_snippets/ios_chrome_ntp_snippets_service_factory.h

Index: ios/chrome/browser/ntp_snippets/ios_chrome_ntp_snippets_service_factory.h
diff --git a/ios/chrome/browser/ntp_snippets/ios_chrome_ntp_snippets_service_factory.h b/ios/chrome/browser/ntp_snippets/ios_chrome_ntp_snippets_service_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..350baddb25b68725d74611a7c306ad509d48e615
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+++ b/ios/chrome/browser/ntp_snippets/ios_chrome_ntp_snippets_service_factory.h
@@ -0,0 +1,48 @@
+// 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 IOS_CHROME_BROWSER_NTP_SNIPPETS_IOS_CHROME_NTP_SNIPPETS_SERVICE_FACTORY_H_
+#define IOS_CHROME_BROWSER_NTP_SNIPPETS_IOS_CHROME_NTP_SNIPPETS_SERVICE_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}  // namespace base
+
+namespace ios {
+class ChromeBrowserState;
+}  // namespace ios
+
+namespace ntp_snippets {
+class NTPSnippetsService;
+}  // namespace ntp_snippets
+
+// A factory to create NTPSnippetsService and associate them to
+// ios::ChromeBrowserState.
+class IOSChromeNTPSnippetsServiceFactory
+    : public BrowserStateKeyedServiceFactory {
+ public:
+  static IOSChromeNTPSnippetsServiceFactory* GetInstance();
+  static ntp_snippets::NTPSnippetsService* GetForBrowserState(
+      ios::ChromeBrowserState* browser_state);
+
+ private:
+  friend struct base::DefaultSingletonTraits<
+      IOSChromeNTPSnippetsServiceFactory>;
+
+  IOSChromeNTPSnippetsServiceFactory();
+  ~IOSChromeNTPSnippetsServiceFactory() override;
+
+  // BrowserStateKeyedServiceFactory implementation.
+  scoped_ptr<KeyedService> BuildServiceInstanceFor(
+      web::BrowserState* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(IOSChromeNTPSnippetsServiceFactory);
+};
+
+#endif  // IOS_CHROME_BROWSER_NTP_SNIPPETS_IOS_CHROME_NTP_SNIPPETS_SERVICE_FACTORY_H_