SyncFS: Support resolveLocalFileSystemURL on SyncFileSystem

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 b4b5aefc866fdaa0d599b4f093b8f8cf462f43fe..acf963faf29784489969a8ddec1e16600f2a798e 100644
--- a/content/browser/fileapi/fileapi_message_filter.cc
+++ b/content/browser/fileapi/fileapi_message_filter.cc
@@ -159,6 +159,7 @@ bool FileAPIMessageFilter::OnMessageReceived(
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_EX(FileAPIMessageFilter, message, *message_was_ok)
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_Open, OnOpen)
+    IPC_MESSAGE_HANDLER(FileSystemHostMsg_ResolveURL, OnResolveURL)
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_DeleteFileSystem, OnDeleteFileSystem)
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_Move, OnMove)
     IPC_MESSAGE_HANDLER(FileSystemHostMsg_Copy, OnCopy)
@@ -227,6 +228,21 @@ void FileAPIMessageFilter::OnOpen(
       &FileAPIMessageFilter::DidOpenFileSystem, this, request_id));
 }
 
+void FileAPIMessageFilter::OnResolveURL(
+    int request_id,
+    const GURL& filesystem_url) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  base::PlatformFileError error;
+  FileSystemURL url(context_->CrackURL(filesystem_url));
+  if (!HasPermissionsForFile(url, fileapi::kReadFilePermissions, &error)) {
+    Send(new FileSystemMsg_DidFail(request_id, error));
+    return;
+  }
+
+  context_->ResolveURL(filesystem_url, base::Bind(
+      &FileAPIMessageFilter::DidResolveURL, this, request_id));
+}
+
 void FileAPIMessageFilter::OnDeleteFileSystem(
     int request_id,
     const GURL& origin_url,
@@ -791,6 +807,23 @@ void FileAPIMessageFilter::DidOpenFileSystem(int request_id,
   // For OpenFileSystem we do not create a new operation, so no unregister here.
 }
 
+void FileAPIMessageFilter::DidResolveURL(int request_id,
+                                         base::PlatformFileError result,
+                                         const std::string& name,
+                                         const GURL& root,
+                                         const base::FilePath& file_path,
+                                         bool is_directory) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  if (result == base::PLATFORM_FILE_OK) {
+    DCHECK(root.is_valid());
+    Send(new FileSystemMsg_DidResolveURL(
+        request_id, name, root, file_path, is_directory));
+  } else {
+    Send(new FileSystemMsg_DidFail(request_id, result));
+  }
+  // For ResolveURL we do not create a new operation, so no unregister here.
+}
+
 void FileAPIMessageFilter::DidDeleteFileSystem(
     int request_id,
     base::PlatformFileError result) {