Implement improvements for request handling (issue #1327).

- Add a new CefRequestHandler::OnResourceResponse() method for inspecting the request/response headers and potentially restarting or redirecting the request.
- Add a new CefRequest::GetIdentifier() method for tracking a request across multiple CefRequestHandler callbacks.
- Pass a CefRequest object instead of just the old URL to CefRequestHandler::OnResourceRedirect().

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@2073 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/common/response_impl.h

@@ -12,6 +12,7 @@
 
 namespace net {
 class HttpResponseHeaders;
+class URLRequest;
 }
 
 namespace blink {
@@ -39,6 +40,7 @@ class CefResponseImpl : public CefResponse {
   void SetResponseHeaders(const net::HttpResponseHeaders& headers);
 
   void Set(const blink::WebURLResponse& response);
+  void Set(const net::URLRequest* request);
 
   void SetReadOnly(bool read_only);