Revise about: and chrome: url handling.

chrome/browser/history/history.cc

Index: chrome/browser/history/history.cc
diff --git a/chrome/browser/history/history.cc b/chrome/browser/history/history.cc
index cbed0a6331e2a508dabf8a287e903da416673ab0..45e8364601107cf6317b259eeff32853d8be93f6 100644
--- a/chrome/browser/history/history.cc
+++ b/chrome/browser/history/history.cc
@@ -704,13 +704,10 @@ bool HistoryService::CanAddURL(const GURL& url) {
       url.SchemeIs(chrome::kChromeInternalScheme))
     return false;
 
-  if (url.SchemeIs(chrome::kAboutScheme)) {
-    if (LowerCaseEqualsASCII(url.path(), "blank"))
-      return false;
-    // We allow all other about URLs since the user may like to see things
-    // like "about:memory" or "about:histograms" in their history and
-    // autocomplete.
-  }
+  // Allow all about: and chrome: URLs except about:blank, since the user may
+  // like to see "chrome://memory/", etc. in their history and autocomplete.
+  if (url == GURL(chrome::kAboutBlankURL))
+    return false;
 
   return true;
 }