DevTools: add an API for extension-supplied trace providers

third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js

Index: third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
diff --git a/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js b/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
index a3b5b448feca9d7957043217d5a92b6e562579bf..a92694f8f7db30116307f286701fc63afc50e73f 100644
--- a/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
+++ b/third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js
@@ -49,12 +49,15 @@ WebInspector.ExtensionServer = function()
     this._sidebarPanes = [];
     /** @type {!Array.<!WebInspector.ExtensionAuditCategory>} */
     this._auditCategories = [];
+    /** @type {!Array.<!WebInspector.ExtensionTraceProvider>} */
+    this._traceProviders = [];
 
     var commands = WebInspector.extensionAPI.Commands;
 
     this._registerHandler(commands.AddAuditCategory, this._onAddAuditCategory.bind(this));
     this._registerHandler(commands.AddAuditResult, this._onAddAuditResult.bind(this));
     this._registerHandler(commands.AddRequestHeaders, this._onAddRequestHeaders.bind(this));
+    this._registerHandler(commands.AddTraceProvider, this._onAddTraceProvider.bind(this));
     this._registerHandler(commands.ApplyStyleSheet, this._onApplyStyleSheet.bind(this));
     this._registerHandler(commands.CreatePanel, this._onCreatePanel.bind(this));
     this._registerHandler(commands.CreateSidebarPane, this._onCreateSidebarPane.bind(this));
@@ -154,7 +157,6 @@ WebInspector.ExtensionServer.prototype = {
         this._postNotification(WebInspector.extensionAPI.Events.InspectedURLChanged, url);
     },
 
-
     /**
      * @param {string} categoryId
      * @param {!WebInspector.ExtensionAuditCategoryResults} auditResults
@@ -174,6 +176,22 @@ WebInspector.ExtensionServer.prototype = {
     },
 
     /**
+     * @param {string} traceProviderId
+     */
+    startTraceRecording: function(traceProviderId)
+    {
+        this._postNotification("trace-recording-started-" + traceProviderId);
+    },
+
+     /**
+     * @param {string} traceProviderId
+     */
+    stopTraceRecording: function(traceProviderId)
+    {
+        this._postNotification("trace-recording-stopped-" + traceProviderId);
+    },
+
+    /**
      * @param {string} type
      * @return {boolean}
      */
@@ -597,6 +615,25 @@ WebInspector.ExtensionServer.prototype = {
     },
 
     /**
+     * @param {!Object} message
+     * @param {!MessagePort} port
+     */
+    _onAddTraceProvider: function(message, port)
+    {
+        var provider = new WebInspector.ExtensionTraceProvider(port._extensionOrigin, message.id, message.categoryName, message.categoryTooltip);
+        this._clientObjects[message.id] = provider;
+        this._traceProviders.push(provider);
+    },
+
+    /**
+     * @return {!Array<!WebInspector.ExtensionTraceProvider>}
+     */
+    traceProviders: function()
+    {
+        return this._traceProviders;
+    },
+
+    /**
      * @return {!Array.<!WebInspector.ExtensionAuditCategory>}
      */
     auditCategories: function()