Blimp OAuth2 token retreival on application start up.

blimp/client/public/blimp_client_context.h

Index: blimp/client/public/blimp_client_context.h
diff --git a/blimp/client/public/blimp_client_context.h b/blimp/client/public/blimp_client_context.h
index 8b8638f00417f2dac943ac73c3e97b2a8873a151..52573d3a726e438e4bc4b0ffa1083320b5237447 100644
--- a/blimp/client/public/blimp_client_context.h
+++ b/blimp/client/public/blimp_client_context.h
@@ -54,8 +54,8 @@ class BlimpClientContext : public KeyedService {
   // Creates a new BlimpContents.
   virtual std::unique_ptr<BlimpContents> CreateBlimpContents() = 0;
 
-  // Initiates the process for connecting to the engine.
-  virtual void Connect(const std::string& client_auth_token) = 0;
+  // Start authentication flow and connection to engine.
+  virtual void Connect() = 0;
 
  protected:
   BlimpClientContext() = default;