Revert "[DevTools] Make log agent optional."

third_party/WebKit/Source/devtools/front_end/sdk/ConsoleModel.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /**
  * @constructor
  * @extends {WebInspector.SDKModel}
  * @param {!WebInspector.Target} target
- * @param {?Protocol.LogAgent} logAgent
  */
-WebInspector.ConsoleModel = function(target, logAgent)
+WebInspector.ConsoleModel = function(target)
 {
     WebInspector.SDKModel.call(this, WebInspector.ConsoleModel, target);
 
     /** @type {!Array.<!WebInspector.ConsoleMessage>} */
     this._messages = [];
     /** @type {!Map<number, !WebInspector.ConsoleMessage>} */
     this._messageByExceptionId = new Map();
     this._warnings = 0;
     this._errors = 0;
     this._revokedErrors = 0;
-    this._logAgent = logAgent;
-    if (this._logAgent) {
-        target.registerLogDispatcher(new WebInspector.LogDispatcher(this));
-        this._logAgent.enable();
-    }
+    this._logAgent = target.logAgent();
+    target.registerLogDispatcher(new WebInspector.LogDispatcher(this));
+    this._logAgent.enable();
 }
 
 /** @enum {symbol} */
 WebInspector.ConsoleModel.Events = {
     ConsoleCleared: Symbol("ConsoleCleared"),
     MessageAdded: Symbol("MessageAdded"),
     MessageUpdated: Symbol("MessageUpdated"),
     CommandEvaluated: Symbol("CommandEvaluated")
 }
 
@@ skipping 67 matching lines @@
     /**
      * @return {!Array.<!WebInspector.ConsoleMessage>}
      */
     messages: function()
     {
         return this._messages;
     },
 
     requestClearMessages: function()
     {
-        this._logAgent && this._logAgent.clear();
+        this._logAgent.clear();
         this.clear();
     },
 
     clear: function()
     {
         this._messages = [];
         this._messageByExceptionId.clear();
         this._errors = 0;
         this._revokedErrors = 0;
         this._warnings = 0;
@@ skipping 509 matching lines @@
         this.dispatchEventToListeners(WebInspector.ConsoleModel.Events.CommandEvaluated, event.data);
     },
 
     __proto__: WebInspector.Object.prototype
 }
 
 /**
  * @type {!WebInspector.MultitargetConsoleModel}
  */
 WebInspector.multitargetConsoleModel;