Move "oauth2" manifest key parsing out of Extension class.

chrome/browser/extensions/api/identity/identity_api.h

Index: chrome/browser/extensions/api/identity/identity_api.h
===================================================================
--- chrome/browser/extensions/api/identity/identity_api.h	(revision 176209)
+++ chrome/browser/extensions/api/identity/identity_api.h	(working copy)
@@ -10,6 +10,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/api/identity/web_auth_flow.h"
+#include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
 #include "chrome/browser/extensions/app_notify_channel_setup.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
@@ -19,6 +20,7 @@
 class GetAuthTokenFunctionTest;
 class MockGetAuthTokenFunction;
 class GoogleServiceAuthError;
+class Profile;
 
 namespace extensions {
 
@@ -110,6 +112,24 @@
   scoped_ptr<WebAuthFlow> auth_flow_;
 };
 
+class IdentityAPI : public ProfileKeyedAPI {
+ public:
+  explicit IdentityAPI(Profile* profile);
+  virtual ~IdentityAPI();
+
+  // ProfileKeyedAPI implementation.
+  static ProfileKeyedAPIFactory<IdentityAPI>* GetFactoryInstance();
+
+ private:
+  friend class ProfileKeyedAPIFactory<IdentityAPI>;
+
+  // ProfileKeyedAPI implementation.
+  static const char* service_name() {
+    return "IdentityAPI";
+  }
+  static const bool kServiceIsNULLWhileTesting = true;
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_