Browser Plugin: Move to old namespace

content/renderer/browser_plugin/old/guest_to_embedder_channel.h

Index: content/renderer/browser_plugin/old/guest_to_embedder_channel.h
diff --git a/content/renderer/browser_plugin/old/guest_to_embedder_channel.h b/content/renderer/browser_plugin/old/guest_to_embedder_channel.h
index 7a56ff3115d0840cd1a7f9951e0f3c096e0ec8d8..bc92928ade9acce910dc4bdd8a8bbdbbc84898b4 100644
--- a/content/renderer/browser_plugin/old/guest_to_embedder_channel.h
+++ b/content/renderer/browser_plugin/old/guest_to_embedder_channel.h
@@ -22,6 +22,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 
 namespace content {
+namespace old {
 
 class BrowserPluginChannelManager;
 
@@ -132,6 +133,7 @@ class GuestToEmbedderChannel
   DISALLOW_COPY_AND_ASSIGN(GuestToEmbedderChannel);
 };
 
+}  // namespace old
 }  // namespace content
 
 #endif // CONTENT_RENDERER_BROWSER_PLUGIN_OLD_GUEST_TO_EMBEDDER_CHANNEL_H_