Integrate UI with authentication flow.

blimp/client/core/blimp_client_context_impl.cc

Index: blimp/client/core/blimp_client_context_impl.cc
diff --git a/blimp/client/core/blimp_client_context_impl.cc b/blimp/client/core/blimp_client_context_impl.cc
index 9fe0c91afeafa90f4fb7306c2c392a2df3ca0805..9950ae911a3e3112542a5d737202cd25e7bd6d08 100644
--- a/blimp/client/core/blimp_client_context_impl.cc
+++ b/blimp/client/core/blimp_client_context_impl.cc
@@ -89,10 +89,7 @@ std::unique_ptr<BlimpContents> BlimpClientContextImpl::CreateBlimpContents() {
 void BlimpClientContextImpl::Connect() {
   // Lazy initialization of IdentitySource.
   if (!identity_source_) {
-    identity_source_ = base::MakeUnique<IdentitySource>(
-        delegate_,
-        base::Bind(&BlimpClientContextImpl::ConnectToAssignmentSource,
-                   base::Unretained(this)));
+    CreateIdentitySource();
   }
 
   // Start Blimp authentication flow. The OAuth2 token will be used in
@@ -153,5 +150,11 @@ void BlimpClientContextImpl::RegisterFeatures() {
                                             tab_control_feature_.get()));
 }
 
+void BlimpClientContextImpl::CreateIdentitySource() {
+  identity_source_ = base::MakeUnique<IdentitySource>(
+      delegate_, base::Bind(&BlimpClientContextImpl::ConnectToAssignmentSource,
+                            base::Unretained(this)));
+}
+
 }  // namespace client
 }  // namespace blimp