Identity extension API impl: Split constants into their own file

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 24 matching lines @@
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
 class GetAuthTokenFunctionTest;
 class MockGetAuthTokenFunction;
 
-namespace identity_constants {
-extern const char kInvalidClientId[];
-extern const char kInvalidScopes[];
-extern const char kAuthFailure[];
-extern const char kNoGrant[];
-extern const char kUserRejected[];
-extern const char kUserNotSignedIn[];
-extern const char kInteractionRequired[];
-extern const char kInvalidRedirect[];
-extern const char kOffTheRecord[];
-extern const char kPageLoadFailure[];
-extern const char kCanceled[];
-}  // namespace identity_constants
-
 class IdentityTokenCacheValue {
  public:
   IdentityTokenCacheValue();
   explicit IdentityTokenCacheValue(const IssueAdviceInfo& issue_advice);
   IdentityTokenCacheValue(const std::string& token,
                           base::TimeDelta time_to_live);
   IdentityTokenCacheValue(const IdentityTokenCacheValue& other);
   ~IdentityTokenCacheValue();
 
   // Order of these entries is used to determine whether or not new
@@ skipping 247 matching lines @@
  private:
   ~IdentityGetProfileUserInfoFunction() override;
 
   // UIThreadExtensionFunction implementation.
   ExtensionFunction::ResponseAction Run() override;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_