DevTools: migrate sources panel sidebar to views.

third_party/WebKit/Source/devtools/front_end/ui/Context.js

Index: third_party/WebKit/Source/devtools/front_end/ui/Context.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/Context.js b/third_party/WebKit/Source/devtools/front_end/ui/Context.js
index 9ee5fb851e64f8c3b8108a579ea36717ab994a8d..c657cb1910030bf54d5cbb905b8bf9b58603dc85 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/Context.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/Context.js
@@ -44,6 +44,10 @@ WebInspector.Context.prototype = {
      */
     _dispatchFlavorChange: function(flavorType, flavorValue)
     {
+        self.runtime.extensions(WebInspector.ContextFlavorListener, flavorValue).map(extension => {
+            extension.instance().then(instance => /** @type {!WebInspector.ContextFlavorListener} */ (instance).flavorChanged(flavorValue));
+        });
+
         var dispatcher = this._eventDispatchers.get(flavorType);
         if (!dispatcher)
             return;
@@ -116,4 +120,16 @@ WebInspector.Context.prototype = {
     }
 }
 
+/**
+ * @interface
+ */
+WebInspector.ContextFlavorListener = function() { }
+
+WebInspector.ContextFlavorListener.prototype = {
+    /**
+     * @param {?Object} object
+     */
+    flavorChanged: function(object) { }
+}
+
 WebInspector.context = new WebInspector.Context();