Refactor guest view availability to be API not permission based.

extensions/browser/process_map.cc

Index: extensions/browser/process_map.cc
diff --git a/extensions/browser/process_map.cc b/extensions/browser/process_map.cc
index 12fb5380916ba3c9863254741fe19e545e78556e..0850bc6b27986a68cbbd3ceda9674ee10cf42fb4 100644
--- a/extensions/browser/process_map.cc
+++ b/extensions/browser/process_map.cc
@@ -123,8 +123,9 @@ std::set<std::string> ProcessMap::GetExtensionsInProcess(int process_id) const {
   return result;
 }
 
-Feature::Context ProcessMap::GuessContextType(const Extension* extension,
-                                              int process_id) const {
+Feature::Context ProcessMap::GetMostLikelyContextType(
+    const Extension* extension,
+    int process_id) const {
   // WARNING: This logic must match Dispatcher::ClassifyJavaScriptContext, as
   // much as possible.