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

content/renderer/browser_render_view_browsertest.cc

 // Copyright 2014 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.
 
 // Browser tests targeted at the RenderView that run in browser context.
 // Note that these tests rely on single-process mode, and hence may be
 // disabled in some configurations (check gyp files).
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 119 matching lines @@
     backend_callback.Run(net::OK);
   }
 }
 
 }  // namespace
 
 class RenderViewBrowserTest : public ContentBrowserTest {
  public:
   RenderViewBrowserTest() {}
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     // This method is needed to allow interaction with in-process renderer
     // and use of a test ContentRendererClient.
     command_line->AppendSwitch(switches::kSingleProcess);
   }
 
   void SetUpOnMainThread() override {
     // Override setting of renderer client.
     renderer_client_ = new TestShellContentRendererClient();
     // Explicitly leaks ownership; this object will remain alive
     // until process death.  We don't deleted the returned value,
@@ skipping 83 matching lines @@
 
   error_code = net::OK;
   stale_cache_entry_present = true;
   ASSERT_TRUE(GetLatestErrorFromRendererClient(
       &error_code, &stale_cache_entry_present));
   EXPECT_EQ(net::ERR_FAILED, error_code);
   EXPECT_FALSE(stale_cache_entry_present);
 }
 
 }  // namespace content