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

content/browser/fileapi/fileapi_message_filter.cc

Index: content/browser/fileapi/fileapi_message_filter.cc
diff --git a/content/browser/fileapi/fileapi_message_filter.cc b/content/browser/fileapi/fileapi_message_filter.cc
index 5258fbffd541a9015b580ed36a18ee9c8c53a99d..7beb5c6fc0f0be22fc36f3b468843b63952aca8a 100644
--- a/content/browser/fileapi/fileapi_message_filter.cc
+++ b/content/browser/fileapi/fileapi_message_filter.cc
@@ -119,6 +119,22 @@ void FileAPIMessageFilter::OnChannelClosing() {
        iter != blob_urls_.end(); ++iter) {
     blob_storage_context_->controller()->RemoveBlob(GURL(*iter));
   }
+
+  // Close all files that are previously OpenFile()'ed in this process.
+  if (!open_filesystem_urls_.empty()) {
+    DLOG(INFO)
+        << "File API: Renderer process shut down before NotifyCloseFile"
+        << " for " << open_filesystem_urls_.size() << " files opened in PPAPI";
+  }
+  for (std::multiset<GURL>::const_iterator iter =
+       open_filesystem_urls_.begin();
+       iter != open_filesystem_urls_.end(); ++iter) {
+    FileSystemOperationInterface* operation =
+        context_->CreateFileSystemOperation(*iter);
+    if (operation)
+      operation->NotifyFileClosed(
+          *iter, fileapi::FileSystemOperationInterface::StatusCallback());
+   }
 }
 
 void FileAPIMessageFilter::OverrideThreadForMessage(
@@ -146,6 +162,7 @@ bool FileAPIMessageFilter::OnMessageReceived(
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_TouchFile, OnTouchFile)
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_CancelWrite, OnCancel)
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_OpenFile, OnOpenFile)
+    IPC_MESSAGE_HANDLER(FileSystemHostMsg_NotifyFileClosed, OnNotifyFileClosed)
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_CreateSnapshotFile,
                         OnCreateSnapshotFile)
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_WillUpdate, OnWillUpdate)
@@ -393,6 +410,16 @@ void FileAPIMessageFilter::OnOpenFile(
       base::Bind(&FileAPIMessageFilter::DidOpenFile, this, request_id));
 }
 
+void FileAPIMessageFilter::OnNotifyFileClosed(const GURL& path) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  FileSystemOperationInterface* operation =
+      context_->CreateFileSystemOperation(path);
+  if (operation)
+    operation->NotifyFileClosed(path,
+                                FileSystemOperationInterface::StatusCallback());
+}
+
 void FileAPIMessageFilter::OnWillUpdate(const GURL& path) {
   GURL origin_url;
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));