Fix crash when reloading packaged app.

chrome/browser/extensions/shell_window_registry.cc

Index: chrome/browser/extensions/shell_window_registry.cc
diff --git a/chrome/browser/extensions/shell_window_registry.cc b/chrome/browser/extensions/shell_window_registry.cc
index b9c939d1d090f9b86f7946149cf126bea8a5dc48..216da68bf277891f04d54ef9a022358269551405 100644
--- a/chrome/browser/extensions/shell_window_registry.cc
+++ b/chrome/browser/extensions/shell_window_registry.cc
@@ -85,9 +85,10 @@ void ShellWindowRegistry::RemoveShellWindow(ShellWindow* shell_window) {
   const ShellWindowList::iterator it = std::find(shell_windows_.begin(),
                                                  shell_windows_.end(),
                                                  shell_window);
-  if (it != shell_windows_.end())
+  if (it != shell_windows_.end()) {
     shell_windows_.erase(it);
-  FOR_EACH_OBSERVER(Observer, observers_, OnShellWindowRemoved(shell_window));
+    FOR_EACH_OBSERVER(Observer, observers_, OnShellWindowRemoved(shell_window));
+  }
 }
 
 void ShellWindowRegistry::AddObserver(Observer* observer) {