Remove FOR_EACH_OBSERVER macro usage in chrome/browser/ui

chrome/browser/ui/libgtk2ui/gtk2_ui.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/libgtk2ui/gtk2_ui.h"
 
 #include <math.h>
 #include <pango/pango.h>
 #include <X11/Xcursor/Xcursor.h>
 #include <set>
@@ skipping 699 matching lines @@
     views::WindowButtonOrderObserver* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
 void Gtk2UI::SetWindowButtonOrdering(
     const std::vector<views::FrameButton>& leading_buttons,
     const std::vector<views::FrameButton>& trailing_buttons) {
   leading_buttons_ = leading_buttons;
   trailing_buttons_ = trailing_buttons;
 
-  FOR_EACH_OBSERVER(views::WindowButtonOrderObserver, observer_list_,
-                    OnWindowButtonOrderingChange(leading_buttons_,
-                                                 trailing_buttons_));
+  for (views::WindowButtonOrderObserver& observer : observer_list_)
+    observer.OnWindowButtonOrderingChange(leading_buttons_, trailing_buttons_);
 }
 
 void Gtk2UI::SetNonClientMiddleClickAction(NonClientMiddleClickAction action) {
   middle_click_action_ = action;
 }
 
 std::unique_ptr<ui::LinuxInputMethodContext> Gtk2UI::CreateInputMethodContext(
     ui::LinuxInputMethodContextDelegate* delegate,
     bool is_simple) const {
   return std::unique_ptr<ui::LinuxInputMethodContext>(
@@ skipping 355 matching lines @@
   // Blacklist scaling factors <130% (crbug.com/484400) and round
   // to 1 decimal to prevent rendering problems (crbug.com/485183).
   return scale < 1.3f ? 1.0f : roundf(scale * 10) / 10;
 }
 
 }  // namespace libgtk2ui
 
 views::LinuxUI* BuildGtk2UI() {
   return new libgtk2ui::Gtk2UI;
 }