Drop url_constants dependency in content/.

content/browser/content_browser_client.h

Index: content/browser/content_browser_client.h
diff --git a/content/browser/content_browser_client.h b/content/browser/content_browser_client.h
index 70932b63eb14971fc0745b666050a8824b03c620..d7658dca49ffa7200371614cef5bc6a2027d4c21 100644
--- a/content/browser/content_browser_client.h
+++ b/content/browser/content_browser_client.h
@@ -6,6 +6,7 @@
 #define CONTENT_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #pragma once
 
+#include <set>
 #include <string>
 
 #include "content/common/content_client.h"
@@ -57,6 +58,10 @@ class ContentBrowserClient {
   // group different url schemes in the same SiteInstance.
   virtual GURL GetEffectiveURL(Profile* profile, const GURL& url);
 
+  // Get a list of URL schemes to be considered the same as any SiteInstance.
+  // Returns NULL if no schemes are so privileged.
+  virtual const std::set<std::string>* GetSchemesSameAsAnySiteInstance();
+
   // See RenderViewHostDelegate's comment.
   virtual GURL GetAlternateErrorPageURL(const TabContents* tab);