Wired support for file truncating with RemoteFileSystemOperation::OpenFile() method (case when base…

content/browser/fileapi/fileapi_message_filter.h

Index: content/browser/fileapi/fileapi_message_filter.h
diff --git a/content/browser/fileapi/fileapi_message_filter.h b/content/browser/fileapi/fileapi_message_filter.h
index 88b8197dd34a34ab79d099d973420bb09372d523..efb27c4df6b803d82a429abec4ca20dddb229b80 100644
--- a/content/browser/fileapi/fileapi_message_filter.h
+++ b/content/browser/fileapi/fileapi_message_filter.h
@@ -6,6 +6,7 @@
 #define CONTENT_BROWSER_FILEAPI_FILEAPI_MESSAGE_FILTER_H_
 
 #include <string>
+#include <set>
 
 #include "base/basictypes.h"
 #include "base/file_util_proxy.h"
@@ -102,6 +103,7 @@ class FileAPIMessageFilter : public content::BrowserMessageFilter {
                    const base::Time& last_modified_time);
   void OnCancel(int request_id, int request_to_cancel);
   void OnOpenFile(int request_id, const GURL& path, int file_flags);
+  void OnNotifyFileClosed(const GURL& path);
   void OnWillUpdate(const GURL& path);
   void OnDidUpdate(const GURL& path, int64 delta);
   void OnSyncGetPlatformPath(const GURL& path,
@@ -179,6 +181,10 @@ class FileAPIMessageFilter : public content::BrowserMessageFilter {
   // all of them when the renderer process dies.
   base::hash_set<std::string> blob_urls_;
 
+  // Keep track of file system file URLs opened by OpenFile() in this process.
+  // Need to close all of them when the renderer process dies.
+  std::multiset<GURL> open_filesystem_urls_;
+
   DISALLOW_COPY_AND_ASSIGN(FileAPIMessageFilter);
 };