Add missing (and remove superfluous) 'explicit' from constructors.

content/test/layout_browsertest.h

 // Copyright (c) 2012 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/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "content/test/content_browser_test.h"
 
 class GURL;
 
 namespace content {
 class LayoutTestHttpServer;
 class WebKitTestController;
 
 class InProcessBrowserLayoutTest : public ContentBrowserTest {
  public:
-  explicit InProcessBrowserLayoutTest(const FilePath& test_parent_dir,
-                                      const FilePath& test_case_dir);
+  InProcessBrowserLayoutTest(const FilePath& test_parent_dir,
+                             const FilePath& test_case_dir);
   // Used when running HTTP layout tests. Starts the server in the constructor
   // and keeps it running through the lifetime of this test. This is done to
   // avoid flakiness in restarting the server while the port is still in use.
   // If -1 is passed for |port|, a random number will be used. This is
   // recommended when possible, in case multiple tests are running at the same
   // time. For some tests this isn't possible though, because they use resources
   // that hardcode a specific port.
   InProcessBrowserLayoutTest(const FilePath& test_parent_dir,
                              const FilePath& test_case_dir,
                              int port);
@@ skipping 23 matching lines @@
   FilePath rebase_result_win_dir_;
   int port_;  // -2 means no port.  -1 means random.
   scoped_ptr<LayoutTestHttpServer> test_http_server_;
 
   scoped_ptr<WebKitTestController> test_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessBrowserLayoutTest);
 };
 
 }  // namespace content