Make FileSystemOperation's lifetime more explicit.

webkit/tools/test_shell/simple_file_system.h

Index: webkit/tools/test_shell/simple_file_system.h
diff --git a/webkit/tools/test_shell/simple_file_system.h b/webkit/tools/test_shell/simple_file_system.h
index e1a82367912d790711345bb411b57b6d56e310fc..f1add053bf9c7abac5c0e199cbf04bceb39a076b 100644
--- a/webkit/tools/test_shell/simple_file_system.h
+++ b/webkit/tools/test_shell/simple_file_system.h
@@ -17,8 +17,6 @@ class SimpleFileSystem : public WebKit::WebFileSystem {
   SimpleFileSystem() {}
   virtual ~SimpleFileSystem();
 
-  void RemoveCompletedOperation(int request_id);
-
   // WebKit::WebFileSystem methods.
   virtual void move(const WebKit::WebString& src_path,
                     const WebKit::WebString& dest_path,
@@ -52,10 +50,6 @@ class SimpleFileSystem : public WebKit::WebFileSystem {
   fileapi::FileSystemOperation* GetNewOperation(
       WebKit::WebFileSystemCallbacks* callbacks);
 
-  // Keeps ongoing file system operations.
-  typedef IDMap<fileapi::FileSystemOperation, IDMapOwnPointer> OperationsMap;
-  OperationsMap operations_;
-
   DISALLOW_COPY_AND_ASSIGN(SimpleFileSystem);
 };