[fsp] Add support for creating directories.

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 471c6a1ff7d44bb0ca8e694a0680fce31f1c92c5..c08a884751c23d27f2353b529b76c2c7210c091b 100644
--- a/chrome/common/extensions/api/file_system_provider.idl
+++ b/chrome/common/extensions/api/file_system_provider.idl
@@ -109,6 +109,15 @@ namespace fileSystemProvider {
     double length;
   };
 
+  // Options for the <code>onCreateDirectoryRequested()</code> event.
+  dictionary CreateDirectoryRequestedOptions {
+    DOMString fileSystemId;
+    long requestId;
+    DOMString directoryPath;
+    boolean exclusive;
+    boolean recursive;
+  };
+
   // Callback to receive the result of mount() function.
   callback MountCallback = void([nodoc, instanceOf=DOMError] object error);
 
@@ -218,6 +227,15 @@ namespace fileSystemProvider {
         ReadFileRequestedOptions options,
         FileDataCallback successCallback,
         ProviderErrorCallback errorCallback);
+
+    // Raised when creating a directory is requested. If <code>exclusive</code>
+    // is set to true, then the operation should fail if the target directory
+    // already exists. If <code>recursive</code> is true, then all of the
+    // missing directories on the directory path should be created.
+    [maxListeners=1, nodoc] static void onCreateDirectoryRequested(
+        CreateDirectoryRequestedOptions options,
+        ProviderSuccessCallback successCallback,
+        ProviderErrorCallback errorCallback);
   };
 };