Extract duplicated code in browser_tests for closing a browser.

chrome/test/base/in_process_browser_test.h

Index: chrome/test/base/in_process_browser_test.h
diff --git a/chrome/test/base/in_process_browser_test.h b/chrome/test/base/in_process_browser_test.h
index c6eb60acfef10fc61f1b9ea4133897939ff6171c..9bdb6120531d6eb204f02cd4447fd7dbabadf8b9 100644
--- a/chrome/test/base/in_process_browser_test.h
+++ b/chrome/test/base/in_process_browser_test.h
@@ -108,6 +108,14 @@ class InProcessBrowserTest : public content::BrowserTestBase {
   // Returns the browser created by CreateBrowser.
   Browser* browser() const { return browser_; }
 
+  // Closes the given browser and synchronously flushes all of its outstanding
+  // resources.
+  void CloseBrowserSynchronously(Browser* browser);
+
+  // Closes all browsers. No guarantees are made about the destruction of
+  // outstanding resources.

[erikchen, 2015/07/08 22:05:44]

There is only one caller of this method, and I just replicated its code, with
the addition of the autoreleasepool drain.

+  void CloseAllBrowsers();
+
   // Convenience methods for adding tabs to a Browser.
   void AddTabAtIndexToBrowser(Browser* browser,
                               int index,