Coalesce more hardcoded schemes to using predefined constants.

chrome/browser/renderer_host/render_view_host.cc

 // Copyright (c) 2006-2008 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/renderer_host/render_view_host.h"
 
 #include <string>
 #include <vector>
 
 #include "base/gfx/native_widget_types.h"
@@ skipping 10 matching lines @@
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 #include "chrome/browser/renderer_host/render_widget_host.h"
 #include "chrome/browser/renderer_host/render_widget_host_view.h"
 #include "chrome/browser/tab_contents/navigation_entry.h"
 #include "chrome/browser/tab_contents/site_instance.h"
 #include "chrome/browser/tab_contents/web_contents.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/resource_bundle.h"
 #include "chrome/common/notification_service.h"
 #include "chrome/common/notification_type.h"
+#include "chrome/common/url_constants.h"
 #include "chrome/common/thumbnail_score.h"
 #include "net/base/net_util.h"
 #include "skia/include/SkBitmap.h"
 #include "webkit/glue/autofill_form.h"
 
 using base::TimeDelta;
 
 namespace {
 
 void FilterURL(RendererSecurityPolicy* policy, int renderer_id, GURL* url) {
   if (!url->is_valid())
     return;  // We don't need to block invalid URLs.
 
-  if (url->SchemeIs("about")) {
+  if (url->SchemeIs(chrome::kAboutScheme)) {
     // The renderer treats all URLs in the about: scheme as being about:blank.
     // Canonicalize about: URLs to about:blank.
-    *url = GURL("about:blank");
+    *url = GURL(chrome::kAboutBlankURL);
   }
 
   if (!policy->CanRequestURL(renderer_id, *url)) {
     // If this renderer is not permitted to request this URL, we invalidate the
     // URL.  This prevents us from storing the blocked URL and becoming confused
     // later.
     LOG(INFO) << "Blocked URL " << url->spec();
     *url = GURL();
   }
 }
@@ skipping 1236 matching lines @@
                                                std::string event_arg) {
   Send(new ViewMsg_PersonalizationEvent(routing_id(), event_name, event_arg));
 }
 #endif
 
 void RenderViewHost::ForwardMessageFromExternalHost(
     const std::string& target, const std::string& message) {
   Send(new ViewMsg_HandleMessageFromExternalHost(routing_id(), target,
                                                  message));
 }