Start implementing an auth flow for platform apps to be able to do auth

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 137883)
+++ chrome/browser/extensions/api/identity/identity_api.h	(working copy)
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/extensions/api/identity/web_auth_flow.h"
 #include "chrome/browser/extensions/app_notify_channel_setup.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/common/net/gaia/oauth2_mint_token_flow.h"
@@ -37,6 +38,24 @@
   scoped_ptr<OAuth2MintTokenFlow> flow_;
 };
 
+class LaunchWebAuthFlowFunction : public AsyncExtensionFunction,
+                                  public WebAuthFlow::Delegate {
+ public:
+  LaunchWebAuthFlowFunction();
+
+ private:
+  virtual ~LaunchWebAuthFlowFunction();
+  virtual bool RunImpl() OVERRIDE;
+
+  // WebAuthFlow::Delegate implementation.
+  virtual void OnAuthFlowSuccess(const std::string& redirect_url) OVERRIDE;
+  virtual void OnAuthFlowFailure() OVERRIDE;
+
+  scoped_ptr<WebAuthFlow> auth_flow_;
+
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.identity.launchWebAuthFlow");
+};
+
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_