[DevTools] Switch from separate sendMessageToBackend method to using embedder.

Source/devtools/front_end/host/InspectorFrontendHost.js

Index: Source/devtools/front_end/host/InspectorFrontendHost.js
diff --git a/Source/devtools/front_end/host/InspectorFrontendHost.js b/Source/devtools/front_end/host/InspectorFrontendHost.js
index e49c5bbcd22ec81a0eaffe65738dde40b769e311..bdb5e3c71a37338ec506cd44fcc505007c3bfa91 100644
--- a/Source/devtools/front_end/host/InspectorFrontendHost.js
+++ b/Source/devtools/front_end/host/InspectorFrontendHost.js
@@ -221,12 +221,7 @@ InspectorFrontendHostAPI.prototype = {
     /**
      * @param {string} message
      */
-    sendMessageToBackend: function(message) { },
-
-    /**
-     * @param {string} message
-     */
-    sendMessageToEmbedder: function(message) { },
+    sendMessageToBrowser: function(message) { },
 
     /**
      * @param {boolean} enabled
@@ -434,14 +429,7 @@ WebInspector.InspectorFrontendHostStub.prototype = {
     /**
      * @param {string} message
      */
-    sendMessageToBackend: function(message)
-    {
-    },
-
-    /**
-     * @param {string} message
-     */
-    sendMessageToEmbedder: function(message)
+    sendMessageToBrowser: function(message)
     {
     },