Move a bunch of content\common code into the content namespace.

content/common/gpu/x_util.h

 // 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.
 
 #ifndef CHROME_GPU_X_UTIL_H_
 #define CHROME_GPU_X_UTIL_H_
 
 // Some X-Windows specific stuff. This can be included on any platform, and will
 // be a NOP on non-Linux ones.
 
 #include "build/build_config.h"
 #include "content/common/gpu/gpu_config.h"
 
 #if defined(USE_X11)
 
+namespace content {
+
 // Forward declares ------------------------------------------------------------
 //
 // X Windows headers do a lot of evil stuff, like "#define Status int" which
 // will cause many problems when combined with our other header files (like
 // ones that define a class local enum called "Status."
 //
 // These definitions are not Kosher, but allow us to remove this dependency and
 // actually compile X at all.
 
 typedef unsigned long XID;
 
 extern "C" {
 
 typedef struct _XDisplay Display;
 typedef struct __GLXcontextRec *GLXContext;
 
 }  // extern "C"
 
 // Utils -----------------------------------------------------------------------
 
 // scoped_ptr functor for XFree(). Use as follows:
 //   scoped_ptr_mallox<XVisualInfo, ScopedPtrXFree> foo(...);
 // where "XVisualInfo" is any X type that is freed with XFree.
 class ScopedPtrXFree {
  public:
   void operator()(void* x) const;
 };
 
+}  // namespace content
+
 #endif  // USE_X11
 
 #endif  // CHROME_GPU_X_UTIL_H_