Convert EventRouter to use ProcessMap::GetMostLikelyContextType rather than

extensions/common/extension_api.h

Index: extensions/common/extension_api.h
diff --git a/extensions/common/extension_api.h b/extensions/common/extension_api.h
index d03c3390ff6a58c8655ba34dbfb2db7ad992bd26..8c7a689d1e11a3369d554519813574929a118ec8 100644
--- a/extensions/common/extension_api.h
+++ b/extensions/common/extension_api.h
@@ -104,11 +104,6 @@ class ExtensionAPI {
                                       Feature::Context context,
                                       const GURL& url);
 
-  // Returns true if |name| is available to |extension| in any untrusted
-  // extension context, such as content scripts, iframes, or web pages.
-  bool IsAvailableInUntrustedContext(const std::string& name,
-                                     const Extension* extension);
-
   // Returns true if |name| is available to WebUI contexts on |url|.
   bool IsAvailableToWebUI(const std::string& name, const GURL& url);