[MD Settings] PROOF OF CONCEPT - DO NOT LAND - URL rewrite

chrome/browser/extensions/extension_web_ui.cc

Index: chrome/browser/extensions/extension_web_ui.cc
diff --git a/chrome/browser/extensions/extension_web_ui.cc b/chrome/browser/extensions/extension_web_ui.cc
index 06dae536319e928b0756de4657c4c339b9638456..1fa37bce329f281f2a2811472280f3b9f700921a 100644
--- a/chrome/browser/extensions/extension_web_ui.cc
+++ b/chrome/browser/extensions/extension_web_ui.cc
@@ -377,6 +377,9 @@ bool ExtensionWebUI::HandleChromeURLOverride(
   if (!url->SchemeIs(content::kChromeUIScheme))
     return false;
 
+  if (!browser_context)
+    return false;
+
   Profile* profile = Profile::FromBrowserContext(browser_context);
   const base::DictionaryValue* overrides =
       profile->GetPrefs()->GetDictionary(kExtensionURLOverrides);
@@ -440,6 +443,9 @@ bool ExtensionWebUI::HandleChromeURLOverride(
 // static
 bool ExtensionWebUI::HandleChromeURLOverrideReverse(
     GURL* url, content::BrowserContext* browser_context) {
+  if (!browser_context)
+    return false;
+
   Profile* profile = Profile::FromBrowserContext(browser_context);
   const base::DictionaryValue* overrides =
       profile->GetPrefs()->GetDictionary(kExtensionURLOverrides);