net: Implement canceling of all async operations in FileStream.

net/url_request/url_request_file_job.h

Index: net/url_request/url_request_file_job.h
diff --git a/net/url_request/url_request_file_job.h b/net/url_request/url_request_file_job.h
index 4f34314d413872df21c8f1be9694bc34ad01d3f8..15c7d62b0e1cefaa0a085ded66647c2b8dca32be 100644
--- a/net/url_request/url_request_file_job.h
+++ b/net/url_request/url_request_file_job.h
@@ -9,18 +9,22 @@
 #include <vector>
 
 #include "base/file_path.h"
-#include "net/base/file_stream.h"
 #include "net/base/net_export.h"
 #include "net/http/http_byte_range.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_job.h"
 
+namespace base{
+struct PlatformFileInfo;
+}
 namespace file_util {
 struct FileInfo;
 }
 
 namespace net {
 
+class FileStream;
+
 // A request job that handles reading file URLs
 class NET_EXPORT URLRequestFileJob : public URLRequestJob {
  public:
@@ -56,7 +60,7 @@ class NET_EXPORT URLRequestFileJob : public URLRequestJob {
   // Callback after data is asynchronously read from the file.
   void DidRead(int result);
 
-  FileStream stream_;
+  scoped_ptr<FileStream> stream_;
   bool is_directory_;
 
   HttpByteRange byte_range_;