Revise about: and chrome: url handling.

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 610de02d61a1ff66125775e267477ac9dc0dc67b..53caf57110363ca7768f58eb544d84a97cb9e71c 100644
--- a/content/browser/site_instance.cc
+++ b/content/browser/site_instance.cc
@@ -17,12 +17,10 @@ static bool IsURLSameAsAnySiteInstance(const GURL& url) {
   if (!url.is_valid())
     return false;
 
-  // 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) {
+  // We treat javascript: as the same site as any URL since it is actually
+  // a modifier on existing pages.
+  if (url.SchemeIs(chrome::kJavaScriptScheme))
     return true;
-  }
 
   return
       content::GetContentClient()->browser()->IsURLSameAsAnySiteInstance(url);