arc: Enable silent PlayStore Sign-In.

chrome/browser/chromeos/arc/arc_auth_context.h

Index: chrome/browser/chromeos/arc/arc_auth_context.h
diff --git a/chrome/browser/chromeos/arc/arc_auth_context.h b/chrome/browser/chromeos/arc/arc_auth_context.h
index d1f111525f88a203030462f00fdfe7467c932847..c391a6f06ca7d27dcc392e778508c7f821f5fc78 100644
--- a/chrome/browser/chromeos/arc/arc_auth_context.h
+++ b/chrome/browser/chromeos/arc/arc_auth_context.h
@@ -10,7 +10,9 @@
 
 #include "base/macros.h"
 #include "base/timer/timer.h"
+#include "google_apis/gaia/oauth2_token_service.h"
 #include "google_apis/gaia/ubertoken_fetcher.h"
+#include "net/url_request/url_fetcher.h"
 
 class Profile;
 class ProfileOAuth2TokenService;
@@ -25,12 +27,15 @@ class ArcAuthContextDelegate;
 
 class ArcAuthContext : public UbertokenConsumer,
                        public GaiaAuthConsumer,
-                       public OAuth2TokenService::Observer {
+                       public OAuth2TokenService::Observer,
+                       public OAuth2TokenService::Consumer,
+                       public net::URLFetcherDelegate {

[xiyuan, 2016/09/07 21:07:55]

Can we create a separate class and make it a member of ArcAuthContext instead of
using inheritance? That way, it would be easier to read the code and move it
around (e.g. moving into /google_apis in the future).

[khmel, 2016/09/07 23:08:53]

+1 

  public:
   ArcAuthContext(ArcAuthContextDelegate* delegate, Profile* profile);
   ~ArcAuthContext() override;
 
   void PrepareContext();
+  void FetchAuthCode(const std::string& auth_endpoint);
 
   // OAuth2TokenService::Observer:
   void OnRefreshTokenAvailable(const std::string& account_id) override;
@@ -44,17 +49,31 @@ class ArcAuthContext : public UbertokenConsumer,
   void OnMergeSessionSuccess(const std::string& data) override;
   void OnMergeSessionFailure(const GoogleServiceAuthError& error) override;
 
+  // OAuth2TokenService::Consumer:
+  void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
+                         const std::string& access_token,
+                         const base::Time& expiration_time) override;
+  void OnGetTokenFailure(const OAuth2TokenService::Request* request,
+                         const GoogleServiceAuthError& error) override;
+
+  // net::URLFetcherDelegate:
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
+
   const std::string& account_id() const { return account_id_; }
 
   ProfileOAuth2TokenService* token_service() { return token_service_; }
 
  private:
   void StartFetchers();
+  void ResetFetchers();
   void OnRefreshTokenTimeout();
 
   // Unowned pointers.
   ArcAuthContextDelegate* const delegate_;
+  Profile* const profile_;
   ProfileOAuth2TokenService* token_service_;
+  // URL to request auth code.
+  std::string auth_endpoint_;
 
   bool context_prepared_ = false;
 
@@ -65,6 +84,8 @@ class ArcAuthContext : public UbertokenConsumer,
   std::string account_id_;
   std::unique_ptr<GaiaAuthFetcher> merger_fetcher_;
   std::unique_ptr<UbertokenFetcher> ubertoken_fetcher_;
+  std::unique_ptr<OAuth2TokenService::Request> login_token_request_;
+  std::unique_ptr<net::URLFetcher> auth_code_fetcher_;
   base::OneShotTimer refresh_token_timeout_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAuthContext);