Refactor guest view availability to be API not permission based.

extensions/renderer/dispatcher.cc

Index: extensions/renderer/dispatcher.cc
diff --git a/extensions/renderer/dispatcher.cc b/extensions/renderer/dispatcher.cc
index 130f585a18cf86214f8e58679173030ef51b463a..f09d5fdcdb705718825f7c2ea286cc177f6df965 100644
--- a/extensions/renderer/dispatcher.cc
+++ b/extensions/renderer/dispatcher.cc
@@ -1174,7 +1174,7 @@ Feature::Context Dispatcher::ClassifyJavaScriptContext(
     int extension_group,
     const GURL& url,
     const blink::WebSecurityOrigin& origin) {
-  // WARNING: This logic must match ProcessMap::GuessContextType, as much as
+  // WARNING: This logic must match ProcessMap::GetContextType, as much as
   // possible.
 
   DCHECK_GE(extension_group, 0);