Browser Plugin: Move to old namespace

content/browser/browser_plugin/old/browser_plugin_host.h

Index: content/browser/browser_plugin/old/browser_plugin_host.h
diff --git a/content/browser/browser_plugin/old/browser_plugin_host.h b/content/browser/browser_plugin/old/browser_plugin_host.h
index 814c8e98d7f17957fa883dfe5b9992ce51c563ba..82bd2b8810b576f4870d0d6ae445954ef67d6ff5 100644
--- a/content/browser/browser_plugin/old/browser_plugin_host.h
+++ b/content/browser/browser_plugin/old/browser_plugin_host.h
@@ -25,6 +25,9 @@ namespace content {
 
 class RenderProcessHost;
 
+namespace old {
+
+
 // A BrowserPluginHost object is used by both embedders and guests.
 // The primary purpose of BrowserPluginHost is to allow an embedder
 // to manage the lifetime of its guests. It cleans up its guests
@@ -127,6 +130,7 @@ class BrowserPluginHost : public WebContentsObserver,
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginHost);
 };
 
+}  // namespace old
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_OLD_BROWSER_PLUGIN_HOST_H_