Implement a ResourceThrottle for URL overriding in Chrome on Android.

net/url_request/url_request.cc

Index: net/url_request/url_request.cc
diff --git a/net/url_request/url_request.cc b/net/url_request/url_request.cc
index fef10fbdb0b4bd2bea18f1c0f110eff6f0ed8c60..85fcbdfd0f2ffa71e87147837aa05f9d1556089e 100644
--- a/net/url_request/url_request.cc
+++ b/net/url_request/url_request.cc
@@ -478,30 +478,38 @@ void URLRequest::RestartWithJob(URLRequestJob *job) {
 }
 
 void URLRequest::Cancel() {
-  DoCancel(ERR_ABORTED, SSLInfo());
+  DoCancel(URLRequestStatus(URLRequestStatus::CANCELED, ERR_ABORTED),
+           SSLInfo());
 }
 
 void URLRequest::CancelWithError(int error) {
-  DoCancel(error, SSLInfo());
+  DCHECK(error < 0);
+  DoCancel(URLRequestStatus(URLRequestStatus::CANCELED, error),
+           SSLInfo());
 }
 
 void URLRequest::CancelWithSSLError(int error, const SSLInfo& ssl_info) {
+  DCHECK(error < 0);
   // This should only be called on a started request.
   if (!is_pending_ || !job_ || job_->has_response_started()) {
     NOTREACHED();
     return;
   }
-  DoCancel(error, ssl_info);
+  DoCancel(URLRequestStatus(URLRequestStatus::CANCELED, error),
+           SSLInfo());
 }
 
-void URLRequest::DoCancel(int error, const SSLInfo& ssl_info) {
-  DCHECK(error < 0);
+void URLRequest::CancelWithHandledExternallyStatus() {
+  DoCancel(URLRequestStatus(URLRequestStatus::HANDLED_EXTERNALLY, OK),
+           SSLInfo());
+}
 
+void URLRequest::DoCancel(const URLRequestStatus& status,
+                          const SSLInfo& ssl_info) {
   // If the URL request already has an error status, then canceling is a no-op.
   // Plus, we don't want to change the error status once it has been set.
   if (status_.is_success()) {
-    status_.set_status(URLRequestStatus::CANCELED);
-    status_.set_error(error);
+    status_ = status;
     response_info_.ssl_info = ssl_info;
   }