Clean up thread handling in Blimp browser tests.

blimp/engine/browser_tests/engine_browsertest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/ptr_util.h"
 #include "blimp/client/core/contents/ime_feature.h"
 #include "blimp/client/core/contents/mock_ime_feature_delegate.h"
 #include "blimp/client/core/contents/mock_navigation_feature_delegate.h"
 #include "blimp/client/core/contents/navigation_feature.h"
 #include "blimp/client/core/contents/tab_control_feature.h"
@@ skipping 52 matching lines @@
   testing::InSequence s;
 
   EXPECT_TRUE(embedded_test_server()->Start());
   GURL url = embedded_test_server()->GetURL("/hello.html");
 
   EXPECT_CALL(client_rw_feature_delegate_, OnRenderWidgetCreated(1));
   EXPECT_CALL(client_nav_feature_delegate_,
               OnTitleChanged(kDummyTabId, url.GetContent()));
   EXPECT_CALL(client_nav_feature_delegate_,
               OnTitleChanged(kDummyTabId, "hello"))
-      .WillOnce(InvokeWithoutArgs(this, &EngineBrowserTest::QuitRunLoop));
+      .WillOnce(InvokeWithoutArgs(this, &EngineBrowserTest::SignalCompletion));
 
   // Skip assigner. Engine info is already available.
   client_session_->ConnectWithAssignment(client::ASSIGNMENT_REQUEST_RESULT_OK,
                                          GetAssignment());
   client_session_->GetTabControlFeature()->SetSizeAndScale(gfx::Size(100, 100),
                                                            1);
   client_session_->GetTabControlFeature()->CreateTab(kDummyTabId);
   client_session_->GetNavigationFeature()->NavigateToUrlText(kDummyTabId,
                                                              url.spec());
 
-  RunUntilQuit();
+  RunUntilCompletion();
 }
 
 }  // namespace
 }  // namespace blimp