Extract chrome.runtime API code from extensions::EventRouter

chrome/browser/extensions/api/runtime/runtime_api.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_EXTENSIONS_API_RUNTIME_RUNTIME_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_RUNTIME_RUNTIME_API_H_
 
 #include <string>
 
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "chrome/common/extensions/api/runtime.h"
+#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
 namespace base {
 class Version;
 }
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 class Extension;
 class ExtensionHost;
 
+// Runtime API dispatches onStartup, onInstalled, and similar events to
+// extensions. There is one instance shared between a browser context and
+// its related incognito instance.
+class RuntimeAPI : public BrowserContextKeyedService,

[James Cook, 2013/11/14 01:34:02]

I decided to make this a BCKS instead of a ProfileKeyedAPI because it doesn't
actually need Profile (BrowserContext is enough) and I think this will make it
easier to move into src/extensions later.

+                   public content::NotificationObserver {
+ public:
+  explicit RuntimeAPI(content::BrowserContext* context);
+  virtual ~RuntimeAPI();
+
+  // content::NotificationObserver overrides:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+ private:
+  void OnExtensionsReady();
+  void OnExtensionLoaded(const Extension* extension);
+  void OnExtensionInstalled(const Extension* extension);
+
+  content::BrowserContext* browser_context_;
+
+  // True if we should dispatch the chrome.runtime.onInstalled event with
+  // reason "chrome_update" upon loading each extension.
+  bool dispatch_chrome_updated_event_;
+
+  content::NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(RuntimeAPI);
+};
+
 class RuntimeEventRouter {
  public:
   // Dispatches the onStartup event to all currently-loaded extensions.
   static void DispatchOnStartupEvent(content::BrowserContext* context,
                                      const std::string& extension_id);
 
   // Dispatches the onInstalled event to the given extension.
   static void DispatchOnInstalledEvent(content::BrowserContext* context,
                                        const std::string& extension_id,
                                        const base::Version& old_version,
@@ skipping 99 matching lines @@
                              RUNTIME_GETPACKAGEDIRECTORYENTRY)
 
  protected:
   virtual ~RuntimeGetPackageDirectoryEntryFunction() {}
   virtual bool RunImpl() OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_RUNTIME_RUNTIME_API_H_