Don't use base::MessageLoop::{Quit,QuitClosure} in chrome/

chrome/browser/metrics/metrics_memory_details_browsertest.cc

 // Copyright 2015 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 "chrome/browser/metrics/metrics_memory_details.h"
 
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/test/histogram_tester.h"
 #include "chrome/test/base/in_process_browser_test.h"
@@ skipping 10 matching lines @@
     StartFetch(FROM_CHROME_ONLY);
     content::RunMessageLoop();
   }
 
  private:
   ~TestMemoryDetails() override {}
 
   void OnDetailsAvailable() override {
     MetricsMemoryDetails::OnDetailsAvailable();
     // Exit the loop initiated by StartFetchAndWait().
-    base::MessageLoop::current()->Quit();
+    base::MessageLoop::current()->QuitWhenIdle();
   }
 
   DISALLOW_COPY_AND_ASSIGN(TestMemoryDetails);
 };
 
 }  // namespace
 
 class MetricsMemoryDetailsBrowserTest : public InProcessBrowserTest {
  public:
   MetricsMemoryDetailsBrowserTest() {}
   ~MetricsMemoryDetailsBrowserTest() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MetricsMemoryDetailsBrowserTest);
 };
 
 IN_PROC_BROWSER_TEST_F(MetricsMemoryDetailsBrowserTest, TestMemoryDetails) {
   base::HistogramTester histogram_tester;
 
   scoped_refptr<TestMemoryDetails> details(new TestMemoryDetails);
   details->StartFetchAndWait();
 
   // Memory.Browser histogram should have a single non-0 sample recorded.
   histogram_tester.ExpectTotalCount("Memory.Browser", 1);
   scoped_ptr<base::HistogramSamples> samples(
       histogram_tester.GetHistogramSamplesSinceCreation("Memory.Browser"));
   ASSERT_TRUE(samples);
   EXPECT_NE(0, samples->sum());
 }