DevTools: add methods to our InspectorController stub to prepare for a change in WebKit.

webkit/glue/devtools/js/inspector_controller.js

Index: webkit/glue/devtools/js/inspector_controller.js
diff --git a/webkit/glue/devtools/js/inspector_controller.js b/webkit/glue/devtools/js/inspector_controller.js
index 21447eaeae3a15e39602678e2f316f74d473e918..435d26eb2a7991c1bd301e25767a3f6105274e5c 100644
--- a/webkit/glue/devtools/js/inspector_controller.js
+++ b/webkit/glue/devtools/js/inspector_controller.js
@@ -446,6 +446,7 @@ devtools.InspectorController.prototype.stopProfiling = function() {
 
 
 /**
+ * TODO(mnaganov): Remove after injected script change landing in WebKit.
  * @return {Array.<Object>} Profile snapshots array.
  */
 devtools.InspectorController.prototype.profiles = function() {
@@ -454,6 +455,21 @@ devtools.InspectorController.prototype.profiles = function() {
 
 
 /**
+ * Async function for retrieving headers of existing profiles.
+ */
+devtools.InspectorController.prototype.getProfileHeaders = function(callId) {
+  WebInspector.didGetProfileHeaders(callId, []);
+};
+
+
+/**
+ * Async function for lazy loading an existing profile.
+ */
+devtools.InspectorController.prototype.getProfile = function(callId, uid) {
+};
+
+
+/**
  * Tells backend to create a heap snapshot.
  */
 devtools.InspectorController.prototype.takeHeapSnapshot = function() {