Replace instances of LINUX2 with OS_CHROMEOS and linux2 with chromeos.

views/widget/widget_gtk.cc

 // Copyright (c) 2009 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 "views/widget/widget_gtk.h"
 
 #include "app/gfx/path.h"
 #include "base/compiler_specific.h"
 #include "views/fill_layout.h"
 #include "views/widget/default_theme_provider.h"
@@ skipping 63 matching lines @@
 
 WidgetGtk::~WidgetGtk() {
   MessageLoopForUI::current()->RemoveObserver(this);
 }
 
 void WidgetGtk::Init(GtkWidget* parent,
                      const gfx::Rect& bounds) {
   // Force creation of the RootView if it hasn't been created yet.
   GetRootView();
 
-#if !defined(LINUX2)
+#if !defined(OS_CHROMEOS)
   default_theme_provider_.reset(new DefaultThemeProvider());
 #endif
 
   // Make container here.
   CreateGtkWidget(parent, bounds);
 
   // Make sure we receive our motion events.
 
   // In general we register most events on the parent of all widgets. At a
   // minimum we need painting to happen on the parent (otherwise painting
@@ skipping 729 matching lines @@
 void WidgetGtk::HandleGrabBroke() {
   if (has_capture_) {
     if (is_mouse_down_)
       root_view_->ProcessMouseDragCanceled();
     is_mouse_down_ = false;
     has_capture_ = false;
   }
 }
 
 }  // namespace views