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..1314e1074705f8153431eb3372e54e7ed04f07d7 100644
--- a/chrome/browser/chromeos/arc/arc_auth_context.h
+++ b/chrome/browser/chromeos/arc/arc_auth_context.h
@@ -19,6 +19,10 @@ namespace content {
 class StoragePartition;
 }
 
+namespace net {
+class URLRequestContextGetter;
+}
+
 namespace arc {
 
 class ArcAuthContextDelegate;
@@ -32,6 +36,9 @@ class ArcAuthContext : public UbertokenConsumer,
 
   void PrepareContext();
 
+  // Returns the URL request context information associated with this context.
+  net::URLRequestContextGetter* GetURLRequestContext();
+
   // OAuth2TokenService::Observer:
   void OnRefreshTokenAvailable(const std::string& account_id) override;
   void OnRefreshTokensLoaded() override;
@@ -50,6 +57,7 @@ class ArcAuthContext : public UbertokenConsumer,
 
  private:
   void StartFetchers();
+  void ResetFetchers();
   void OnRefreshTokenTimeout();
 
   // Unowned pointers.