Expose GetLoggingFileName in ContentBrowserClient.

chrome/browser/chrome_content_browser_client_unittest.cc

 // Copyright 2013 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/chrome_content_browser_client.h"
 
 #include <list>
 #include <map>
 #include <memory>
 
@@ skipping 324 matching lines @@
 
   NavigationEntry* entry = browser()->tab_strip_model()->
       GetActiveWebContents()->GetController().GetLastCommittedEntry();
   ASSERT_TRUE(entry != NULL);
   EXPECT_EQ(url_rewritten, entry->GetURL());
   EXPECT_EQ(url_original, entry->GetVirtualURL());
 }
 
 }  // namespace content
 #endif  // !defined(OS_ANDROID)
+
+class ChromeContentBrowserClientGetLoggingFileTest : public testing::Test {};
+
+TEST_F(ChromeContentBrowserClientGetLoggingFileTest, GetLoggingFile) {
+  ChromeContentBrowserClient client;
+  base::FilePath log_file_name;
+  EXPECT_FALSE(client.GetLoggingFileName().empty());
+}