Drop url_constants dependency in content/.

content/browser/site_instance.cc

Index: content/browser/site_instance.cc
diff --git a/content/browser/site_instance.cc b/content/browser/site_instance.cc
index ed8cd9b7bedc371198ac2fb03d29c17ae6b1641e..f96e3b2a6d7671d4e1e5d0d85e0a74fcf432a6c6 100644
--- a/content/browser/site_instance.cc
+++ b/content/browser/site_instance.cc
@@ -4,25 +4,28 @@
 
 #include "content/browser/site_instance.h"
 
-#include "chrome/common/url_constants.h"
 #include "content/browser/browsing_instance.h"
 #include "content/browser/content_browser_client.h"
 #include "content/browser/renderer_host/browser_render_process_host.h"
 #include "content/browser/webui/web_ui_factory.h"
-#include "content/common/notification_service.h"
 #include "content/common/content_client.h"
+#include "content/common/notification_service.h"
+#include "content/common/url_constants.h"
 #include "net/base/registry_controlled_domain.h"
 
-// We treat javascript:, about:crash, about:hang, and about:shorthang as the
-// same site as any URL since they are actually modifiers on existing pages.
 static bool IsURLSameAsAnySiteInstance(const GURL& url) {
   if (!url.is_valid())
     return false;
-  return url.SchemeIs(chrome::kJavaScriptScheme) ||
-         url.spec() == chrome::kAboutCrashURL ||
-         url.spec() == chrome::kAboutKillURL ||
-         url.spec() == chrome::kAboutHangURL ||
-         url.spec() == chrome::kAboutShorthangURL;
+
+  // We treat javascript: and about:crash as the same site as any URL since they
+  // are actually modifiers on existing pages.
+  if (url.SchemeIs(chrome::kJavaScriptScheme) ||
+      url.spec() == chrome::kAboutCrashURL) {
+    return true;
+  }
+
+  return
+      content::GetContentClient()->browser()->IsURLSameAsAnySiteInstance(url);
 }
 
 int32 SiteInstance::next_site_instance_id_ = 1;