separate about page into its own page (included in chrome://chrome)

chrome/common/url_constants.cc

Index: chrome/common/url_constants.cc
diff --git a/chrome/common/url_constants.cc b/chrome/common/url_constants.cc
index 867ab54e51b76731065b2cba64dbf46c9a72bcfb..f85a85faca96a9716b0593f598f7d65900894842 100644
--- a/chrome/common/url_constants.cc
+++ b/chrome/common/url_constants.cc
@@ -24,6 +24,9 @@ const char kAboutVersionURL[] = "about:version";
 
 // Add Chrome UI URLs as necessary, in alphabetical order.
 // Be sure to add the corresponding kChromeUI*Host constant below.
+// This is the About Chrome page.
+const char kChromeUIAboutPageFrameURL[] = "chrome://about-page-frame/";
+// This is a WebUI page that lists other WebUI pages.
 const char kChromeUIAboutURL[] = "chrome://about/";
 const char kChromeUIBookmarksURL[] = "chrome://bookmarks/";
 const char kChromeUICertificateViewerURL[] = "chrome://view-cert/";
@@ -118,6 +121,7 @@ const char kChromeUIAppListURL[] = "chrome://app-list/";
 // Add hosts to kChromePaths in browser_about_handler.cc to be listed by
 // chrome://chrome-urls (about:about) and the built-in AutocompleteProvider.
 const char kChromeUIAboutHost[] = "about";
+const char kChromeUIAboutPageFrameHost[] = "about-page-frame";
 const char kChromeUIAppCacheInternalsHost[] = "appcache-internals";
 const char kChromeUIBlankHost[] = "blank";
 const char kChromeUIBlobInternalsHost[] = "blob-internals";