Modifying the "dangerous download" algorithm.

chrome/browser/renderer_host/resource_dispatcher_host_request_info.h

Index: chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
diff --git a/chrome/browser/renderer_host/resource_dispatcher_host_request_info.h b/chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
index 032c4bdbc59ac37ed27c23bdedb6332c3b9ee898..ead2239a95027b21cf6d9c5c08010ccc36855834 100644
--- a/chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
+++ b/chrome/browser/renderer_host/resource_dispatcher_host_request_info.h
@@ -42,6 +42,7 @@ class ResourceDispatcherHostRequestInfo : public net::URLRequest::UserData {
       uint64 upload_size,
       bool is_download,
       bool allow_download,
+      bool has_user_gesture,
       int host_renderer_id,
       int host_render_view_id);
   virtual ~ResourceDispatcherHostRequestInfo();
@@ -95,6 +96,8 @@ class ResourceDispatcherHostRequestInfo : public net::URLRequest::UserData {
   // Downloads are allowed only as a top level request.
   bool allow_download() const { return allow_download_; }
 
+  bool has_user_gesture() const { return has_user_gesture_; }
+
   // Whether this is a download.
   bool is_download() const { return is_download_; }
   void set_is_download(bool download) { is_download_ = download; }
@@ -214,6 +217,7 @@ class ResourceDispatcherHostRequestInfo : public net::URLRequest::UserData {
   int pending_data_count_;
   bool is_download_;
   bool allow_download_;
+  bool has_user_gesture_;
   int pause_count_;
   std::string frame_origin_;
   std::string main_frame_origin_;