Move CommandLine to base namespace.

tools/gn/trace.h

 // Copyright (c) 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.
 
 #ifndef TOOLS_GN_TRACE_H_
 #define TOOLS_GN_TRACE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 52 matching lines @@
   std::string cmdline_;
 };
 
 class ScopedTrace {
  public:
   ScopedTrace(TraceItem::Type t, const std::string& name);
   ScopedTrace(TraceItem::Type t, const Label& label);
   ~ScopedTrace();
 
   void SetToolchain(const Label& label);
-  void SetCommandLine(const CommandLine& cmdline);
+  void SetCommandLine(const base::CommandLine& cmdline);
 
   void Done();
 
  private:
   TraceItem* item_;
   bool done_;
 };
 
 // Call to turn tracing on. It's off by default.
 void EnableTracing();
 
 // Adds a trace event to the log. Takes ownership of the pointer.
 void AddTrace(TraceItem* item);
 
 // Returns a summary of the current traces, or the empty string if tracing is
 // not enabled.
 std::string SummarizeTraces();
 
 // Saves the current traces to the given filename in JSON format.
 void SaveTraces(const base::FilePath& file_name);
 
 #endif  // TOOLS_GN_TRACE_H_