Identity API: Add chrome.identity.onSignInChanged routing and IDL

chrome/browser/extensions/api/identity/identity_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_IDENTITY_IDENTITY_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 232 matching lines @@
     ~TokenCacheKey();
     bool operator<(const TokenCacheKey& rhs) const;
     std::string extension_id;
     std::set<std::string> scopes;
   };
 
   typedef std::map<TokenCacheKey, IdentityTokenCacheValue> CachedTokens;
 
   explicit IdentityAPI(Profile* profile);
   virtual ~IdentityAPI();
+  void Initialize();
 
   // Request serialization queue for getAuthToken.
   IdentityMintRequestQueue* mint_queue();
 
   // Token cache
   void SetCachedToken(const std::string& extension_id,
                       const std::vector<std::string> scopes,
                       const IdentityTokenCacheValue& token_data);
   void EraseCachedToken(const std::string& extension_id,
                         const std::string& token);
@@ skipping 20 matching lines @@
   friend class ProfileKeyedAPIFactory<IdentityAPI>;
 
   // ProfileKeyedAPI implementation.
   static const char* service_name() {
     return "IdentityAPI";
   }
   static const bool kServiceIsNULLWhileTesting = true;
 
   Profile* profile_;
   GoogleServiceAuthError error_;
+  bool initialized_;
   IdentityMintRequestQueue mint_queue_;
   CachedTokens token_cache_;
 };
 
 template <>
 void ProfileKeyedAPIFactory<IdentityAPI>::DeclareFactoryDependencies();
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_