Add missing destructor to ChromeWatcherCommandLineGenerator.

chrome/app/chrome_watcher_command_line_win.cc

Index: chrome/app/chrome_watcher_command_line_win.cc
diff --git a/chrome/app/chrome_watcher_command_line_win.cc b/chrome/app/chrome_watcher_command_line_win.cc
index 05fb4770bf2bafe5b34454106be56557954dcd55..b1835c576fef070e724c3988733f67717564350a 100644
--- a/chrome/app/chrome_watcher_command_line_win.cc
+++ b/chrome/app/chrome_watcher_command_line_win.cc
@@ -53,6 +53,9 @@ ChromeWatcherCommandLineGenerator::ChromeWatcherCommandLineGenerator(
     const base::FilePath& chrome_exe) : chrome_exe_(chrome_exe) {
 }
 
+ChromeWatcherCommandLineGenerator::~ChromeWatcherCommandLineGenerator() {
+}
+
 bool ChromeWatcherCommandLineGenerator::SetOnInitializedEventHandle(
     HANDLE on_initialized_event_handle) {
   return SetHandle(on_initialized_event_handle, &on_initialized_event_handle_);