Update to Chromium revision 304f01a1 (#358063)

- Improve ordering of CefLoadHandler callbacks. OnLoadingStateChange will
  be called before and after all calls to OnLoadStart and OnLoadEnd.
  OnLoadStart/OnLoadEnd calls will occur as matching pairs
  (see http://crbug.com/539952#c2).
- Remove the |requesting_url| argument to CefGeolocationHandler::
  OnCancelGeolocationPermission. Clients can use the |request_id| argument
  to track this information themselves.
- Fix a crash when loading the PDF extension in multiple browsers with a
  custom CefRequestContext (issue #1757).

patch/patches/ime_1610.patch

@@ -1,8 +1,8 @@
 diff --git input_method_win.cc input_method_win.cc
-index df75bb2..a688138 100644
+index ef500a7..5454067 100644
 --- input_method_win.cc
 +++ input_method_win.cc
-@@ -548,8 +548,9 @@ bool InputMethodWin::IsWindowFocused(const TextInputClient* client) const {
+@@ -586,8 +586,9 @@ bool InputMethodWin::IsWindowFocused(const TextInputClient* client) const {
    // receiving keyboard input as long as it is an active window. This works well
    // even when the |attached_window_handle| becomes active but has not received
    // WM_FOCUS yet.