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

chrome/browser/extensions/install_signer.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/extensions/install_signer.h"
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
@@ skipping 269 matching lines @@
     callback_.Run();
   }
 
  private:
   base::Closure callback_;
   DISALLOW_COPY_AND_ASSIGN(FetcherDelegate);
 };
 
 // static
 ExtensionIdSet InstallSigner::GetForcedNotFromWebstore() {
-  std::string value = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
-      switches::kExtensionsNotWebstore);
+  std::string value =
+      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+          switches::kExtensionsNotWebstore);
   if (value.empty())
     return ExtensionIdSet();
 
   std::vector<std::string> ids;
   base::SplitString(value, ',', &ids);
   return ExtensionIdSet(ids.begin(), ids.end());
 }
 
 namespace {
 
@@ skipping 198 matching lines @@
     if (!verified)
       result.reset();
   }
 
   if (!callback_.is_null())
     callback_.Run(result.Pass());
 }
 
 
 }  // namespace extensions