[DevTools] Turn ConsoleModel into a singleton

third_party/WebKit/Source/devtools/front_end/console/ConsoleView.js

Index: third_party/WebKit/Source/devtools/front_end/console/ConsoleView.js
diff --git a/third_party/WebKit/Source/devtools/front_end/console/ConsoleView.js b/third_party/WebKit/Source/devtools/front_end/console/ConsoleView.js
index 0284371beb975c1851a658e665c48526717b47e1..12af176433379917da11ad0e2614d2b5baf8f897 100644
--- a/third_party/WebKit/Source/devtools/front_end/console/ConsoleView.js
+++ b/third_party/WebKit/Source/devtools/front_end/console/ConsoleView.js
@@ -182,7 +182,7 @@ Console.ConsoleView = class extends UI.VBox {
   }
 
   static clearConsole() {
-    SDK.multitargetConsoleModel.requestClearMessages();
+    SDK.consoleModel.requestClearMessages();
   }
 
   /**
@@ -225,14 +225,11 @@ Console.ConsoleView = class extends UI.VBox {
   }
 
   _fetchMultitargetMessages() {
-    SDK.multitargetConsoleModel.addEventListener(SDK.ConsoleModel.Events.ConsoleCleared, this._consoleCleared, this);
-    SDK.multitargetConsoleModel.addEventListener(
-        SDK.ConsoleModel.Events.MessageAdded, this._onConsoleMessageAdded, this);
-    SDK.multitargetConsoleModel.addEventListener(
-        SDK.ConsoleModel.Events.MessageUpdated, this._onConsoleMessageUpdated, this);
-    SDK.multitargetConsoleModel.addEventListener(
-        SDK.ConsoleModel.Events.CommandEvaluated, this._commandEvaluated, this);
-    SDK.multitargetConsoleModel.messages().forEach(this._addConsoleMessage, this);
+    SDK.consoleModel.addEventListener(SDK.ConsoleModel.Events.ConsoleCleared, this._consoleCleared, this);
+    SDK.consoleModel.addEventListener(SDK.ConsoleModel.Events.MessageAdded, this._onConsoleMessageAdded, this);
+    SDK.consoleModel.addEventListener(SDK.ConsoleModel.Events.MessageUpdated, this._onConsoleMessageUpdated, this);
+    SDK.consoleModel.addEventListener(SDK.ConsoleModel.Events.CommandEvaluated, this._commandEvaluated, this);
+    SDK.consoleModel.messages().forEach(this._addConsoleMessage, this);
     this._viewport.invalidate();
   }
 
@@ -805,7 +802,7 @@ Console.ConsoleView = class extends UI.VBox {
           result.target(), exceptionDetails, SDK.ConsoleMessage.MessageType.Result, undefined, undefined);
     }
     message.setOriginatingMessage(originatingConsoleMessage);
-    SDK.multitargetConsoleModel.addMessage(message);
+    SDK.consoleModel.addMessage(message);
   }
 
   /**