Use a direct include of strings headers in content/browser/, part 2.

content/browser/renderer_host/gtk_im_context_wrapper.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 "content/browser/renderer_host/gtk_im_context_wrapper.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 
 #include <algorithm>
 
 #include "base/logging.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_gtk.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositionUnderline.h"
 #include "ui/base/gtk/gtk_im_context_util.h"
 #include "ui/gfx/gtk_util.h"
 #include "ui/gfx/rect.h"
 
 namespace content {
@@ skipping 628 matching lines @@
     GtkWidget* widget, GtkIMContextWrapper* self) {
   self->HandleHostViewRealize(widget);
 }
 
 void GtkIMContextWrapper::HandleHostViewUnrealizeThunk(
     GtkWidget* widget, GtkIMContextWrapper* self) {
   self->HandleHostViewUnrealize();
 }
 
 }  // namespace content