Update to Chromium revision 9cedf753 (#418732)

- Simplify usage of OnBeforePluginLoad (issue #2015)
- Switch crash reporting from crashpad to breakpad on Windows and OS X.
  Adds a new chrome_elf.dll dependency on Windows (issue #1995)
- Remove CefTextfield::GetPlaceholderTextColor() method which is no
  longer supported by Chromium.

libcef/browser/menu_model_impl.cc

@@ -142,8 +142,8 @@ class CefSimpleMenuModel : public ui::MenuModel {
     impl_->MenuWillShow();
   }
 
-  void MenuClosed() override {
-    impl_->MenuClosed();
+  void MenuWillClose() override {
+    impl_->MenuWillClose();
   }
 
   void SetMenuModelDelegate(
@@ -657,7 +657,7 @@ void CefMenuModelImpl::MenuWillShow() {
   FOR_EACH_OBSERVER(Observer, observers_, MenuWillShow(this));
 }
 
-void CefMenuModelImpl::MenuClosed() {
+void CefMenuModelImpl::MenuWillClose() {
   if (!VerifyContext())
     return;