[fsp] Add support for aborting running operations.

chrome/common/extensions/api/file_system_provider.idl

Index: chrome/common/extensions/api/file_system_provider.idl
diff --git a/chrome/common/extensions/api/file_system_provider.idl b/chrome/common/extensions/api/file_system_provider.idl
index ec87d20b922973779fe4f8fb3d871bd700e8409a..af73a42c69f3e581d5a2bd7a9df14a926d738212 100644
--- a/chrome/common/extensions/api/file_system_provider.idl
+++ b/chrome/common/extensions/api/file_system_provider.idl
@@ -22,7 +22,6 @@ namespace fileSystemProvider {
     NOT_A_DIRECTORY,
     INVALID_OPERATION,
     SECURITY,
-    ABORT,
     NOT_A_FILE,
     NOT_EMPTY,
     INVALID_URL,
@@ -167,6 +166,13 @@ namespace fileSystemProvider {
     ArrayBuffer data;
   };
 
+  // Options for the <code>onAbortRequested()</code> event.
+  dictionary AbortRequestedOptions {
+    DOMString fileSystemId;
+    long requestId;
+    long operationRequestId;
+  };
+
   // Callback to receive the result of mount() function.
   callback MountCallback = void([nodoc, instanceOf=DOMError] object error);
 
@@ -328,6 +334,18 @@ namespace fileSystemProvider {
         WriteFileRequestedOptions options,
         ProviderSuccessCallback successCallback,
         ProviderErrorCallback errorCallback);
+
+    // Raised when aborting an operation with <code>operationRequestId</code>
+    // is requested. The operation executed with <code>operationRequestId</code>
+    // should be immediately stopped and <code>successCallback</code> of this
+    // abort request executed. If aborting fails, then <code>errorCallback
+    // </code> must be called. Note, that callbacks of the aborted operation
+    // should not be called, as they will be ignored. Despite calling <code>
+    // errorCallback</code>, the request may be forcibly aborted. 
+    [maxListeners=1, nodoc] static void onAbortRequested(
+        AbortRequestedOptions options,
+        ProviderSuccessCallback successCallback,
+        ProviderErrorCallback errorCallback);
   };
 };