Define DevTools content API

content/browser/debugger/devtools_http_protocol_handler.h

Index: content/browser/debugger/devtools_http_protocol_handler.h
diff --git a/content/browser/debugger/devtools_http_protocol_handler.h b/content/browser/debugger/devtools_http_protocol_handler.h
index 866f925b98b332f3f85e977e2bb9cbd6104a847a..c25b5cd03814764c7f73edef21ab8e8d12c32c7d 100644
--- a/content/browser/debugger/devtools_http_protocol_handler.h
+++ b/content/browser/debugger/devtools_http_protocol_handler.h
@@ -17,9 +17,12 @@
 #include "net/server/http_server.h"
 #include "net/url_request/url_request.h"
 
-class DevToolsClientHost;
 class TabContents;
 
+namespace content {
+class DevToolsClientHost;
+}
+
 namespace net {
 class URLRequestContext;
 }
@@ -120,7 +123,7 @@ class DevToolsHttpProtocolHandler
   typedef std::map<net::URLRequest*, scoped_refptr<net::IOBuffer> >
       BuffersMap;
   BuffersMap request_to_buffer_io_;
-  typedef std::map<int, DevToolsClientHost*>
+  typedef std::map<int, content::DevToolsClientHost*>
       ConnectionToClientHostMap;
   ConnectionToClientHostMap connection_to_client_host_ui_;
   scoped_ptr<Delegate> delegate_;