ui/gfx: Add a typedef of std::map to improve the readability of GdkCursorCache implementation.

ui/gfx/gtk_util.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 "ui/gfx/gtk_util.h"
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
 #include <stdlib.h>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
-#include "base/linux_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkUnPreMultiply.h"
 #include "ui/gfx/rect.h"
 
 namespace {
 
-// A process wide singleton that manages our usage of gdk
-// cursors. gdk_cursor_new() hits the disk in several places and GdkCursor
-// instances can be reused throughout the process.
+// A process wide singleton that manages our usage of gdk cursors.
+// gdk_cursor_new() hits the disk in several places and GdkCursor instances can
+// be reused throughout the process.
 class GdkCursorCache {
  public:
-   GdkCursorCache() {}
+  GdkCursorCache() {}
   ~GdkCursorCache() {
-    for (std::map<GdkCursorType, GdkCursor*>::iterator it =
-        cursor_cache_.begin(); it != cursor_cache_.end(); ++it) {
-      gdk_cursor_unref(it->second);
+    for (GdkCursorMap::iterator i(cursors_.begin()); i != cursors_.end(); ++i) {
+      gdk_cursor_unref(i->second);
     }
-    cursor_cache_.clear();
+    cursors_.clear();
   }
 
   GdkCursor* GetCursorImpl(GdkCursorType type) {
-    std::map<GdkCursorType, GdkCursor*>::iterator it = cursor_cache_.find(type);
+    GdkCursorMap::iterator it = cursors_.find(type);
     GdkCursor* cursor = NULL;
-    if (it == cursor_cache_.end()) {
+    if (it == cursors_.end()) {
       cursor = gdk_cursor_new(type);
-      cursor_cache_.insert(std::make_pair(type, cursor));
+      cursors_.insert(std::make_pair(type, cursor));
     } else {
       cursor = it->second;
     }
 
     // It is not necessary to add a reference here. The callers can ref the
     // cursor if they need it for something.
     return cursor;
   }
 
-  std::map<GdkCursorType, GdkCursor*> cursor_cache_;
+ private:
+  typedef std::map<GdkCursorType, GdkCursor*> GdkCursorMap;
+  GdkCursorMap cursors_;
 
   DISALLOW_COPY_AND_ASSIGN(GdkCursorCache);
 };
 
 void FreePixels(guchar* pixels, gpointer data) {
   free(data);
 }
 
 }  // namespace
 
@@ skipping 104 matching lines @@
       "  GtkDialog::button-spacing = 6\n"
       "  GtkDialog::content-area-spacing = 18\n"
       "  GtkDialog::content-area-border = 0\n"
       "}\n"
       "widget \"about-dialog\" style : application \"about-dialog\"\n";
 
   gtk_rc_parse_string(kRCText);
 }
 
 }  // namespace gfx