Make FileSystemOperation's lifetime more explicit.

webkit/fileapi/sandboxed_file_system_operation.h

Index: webkit/fileapi/sandboxed_file_system_operation.h
diff --git a/webkit/fileapi/sandboxed_file_system_operation.h b/webkit/fileapi/sandboxed_file_system_operation.h
index 18d47f789927037165cef0c2d3219faf38fa76b2..8794a9dbf085f96b9a72f6004e0d826c8dd564b9 100644
--- a/webkit/fileapi/sandboxed_file_system_operation.h
+++ b/webkit/fileapi/sandboxed_file_system_operation.h
@@ -71,6 +71,8 @@ class SandboxedFileSystemOperation : public FileSystemOperation {
   // Returns true if the given |path| is a valid FileSystem path.
   // Otherwise it calls dispatcher's DidFail method with
   // PLATFORM_FILE_ERROR_SECURITY and returns false.
+  // (Note: this doesn't delete this when it calls DidFail and returns false;
+  // it's the caller's responsibility.)
   bool VerifyFileSystemPathForRead(const FilePath& path);
 
   // Checks the validity of a given |path| for writing.
@@ -85,6 +87,8 @@ class SandboxedFileSystemOperation : public FileSystemOperation {
   // If |create| flag is true this also checks if the |path| contains
   // any restricted names and chars. If it does, the call fires dispatcher's
   // DidFail with PLATFORM_FILE_ERROR_SECURITY and returns false.
+  // (Note: this doesn't delete this when it calls DidFail and returns false;
+  // it's the caller's responsibility.)
   bool VerifyFileSystemPathForWrite(const FilePath& path,
                                     bool create,
                                     int64 growth);