Make callers of CommandLine use it via the base:: namespace.

content/browser/plugin_browsertest.cc

 // 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/command_line.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
@@ skipping 31 matching lines @@
   net::URLRequestMockHTTPJob::AddUrlHandler(
       path, content::BrowserThread::GetBlockingPool());
 }
 
 }
 
 class PluginTest : public ContentBrowserTest {
  protected:
   PluginTest() {}
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     // Some NPAPI tests schedule garbage collection to force object tear-down.
     command_line->AppendSwitchASCII(switches::kJavaScriptFlags, "--expose_gc");
 
 #if defined(OS_WIN)
     const testing::TestInfo* const test_info =
         testing::UnitTest::GetInstance()->current_test_info();
     if (strcmp(test_info->name(), "MediaPlayerNew") == 0) {
       // The installer adds our process names to the registry key below.  Since
       // the installer might not have run on this machine, add it manually.
       base::win::RegKey regkey;
@@ skipping 494 matching lines @@
   ResourceDispatcherHostDelegate* old_delegate =
       ResourceDispatcherHostImpl::Get()->delegate();
   ResourceDispatcherHostImpl::Get()->SetDelegate(&test_delegate);
   LoadAndWait(url);
   test_delegate.WaitForPluginRequest();
   ASSERT_TRUE(test_delegate.found_cookie());
   ResourceDispatcherHostImpl::Get()->SetDelegate(old_delegate);
 }
 
 }  // namespace content