Drop url_constants dependency in content/.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 50307688bc94ce16d37c6d05579e925b8b662733..eaf35a1f3768441cab98a1dcae864bb2fcacaa24 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -170,6 +170,12 @@ GURL ChromeContentBrowserClient::GetEffectiveURL(Profile* profile,
   return extension->GetResourceURL(url.path());
 }
 
+bool ChromeContentBrowserClient::IsURLSameAsAnySiteInstance(const GURL& url) {
+  return url.spec() == chrome::kAboutKillURL ||
+         url.spec() == chrome::kAboutHangURL ||
+         url.spec() == chrome::kAboutShorthangURL;
+}
+
 GURL ChromeContentBrowserClient::GetAlternateErrorPageURL(
     const TabContents* tab) {
   GURL url;