net: Add namespace net to Sdch* classes.

net/base/sdch_filter.h

Index: net/base/sdch_filter.h
diff --git a/net/base/sdch_filter.h b/net/base/sdch_filter.h
index 963cf326cf32b309f87b588e96903e327ba9a863..9eac007d45ec23e2da7476c77eb14cc18faec627 100644
--- a/net/base/sdch_filter.h
+++ b/net/base/sdch_filter.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -22,9 +22,11 @@
 #include "net/base/sdch_manager.h"
 
 namespace open_vcdiff {
-  class VCDiffStreamingDecoder;
+class VCDiffStreamingDecoder;
 }
 
+namespace net {
+
 class SdchFilter : public Filter {
  public:
   explicit SdchFilter(const FilterContext& filter_context);
@@ -115,4 +117,6 @@ class SdchFilter : public Filter {
   DISALLOW_COPY_AND_ASSIGN(SdchFilter);
 };
 
+}  // namespace net
+
 #endif  // NET_BASE_SDCH_FILTER_H_