chrome: Fix URL rewrite on new tab navigation (see issue #2969)

This fixes an `Unhandled chrome.send("getApps");` error when creating a new tab.

Creating a new tab initially loads chrome://newtab which should then be
rewritten to chrome://new-tab-page for normal profiles in
HandleNewTabURLRewrite. Failure to rewrite the URL results in the loading of
NewTabUI instead of the expected NewTabPageUI. NewTabUI loads different
resources for normal vs incognito/guest profiles (new_tab.js vs
incognito_tab.js), and new_tab.js calls chrome.send("getApps") via
page_list_view.js. This then fails in WebUIImpl::ProcessWebUIMessage because
the message is unhandled.

patch/patch.cfg

@@ -250,6 +250,10 @@ patches = [
     # Support override of the User-Agent product component when NetworkService
     # is enabled.
     # https://bitbucket.org/chromiumembedded/cef/issues/2622
+    #
+    # Changes to support the Chrome runtime in CEF
+    # (chrome_content_browser_client.cc).
+    # https://bitbucket.org/chromiumembedded/cef/issues/2969
     'name': 'chrome_browser_product_override',
   },
   {