Migrate most EventEmitter to base/ Emitter

src/common/buffer/Buffer.ts

@@ -161,6 +161,10 @@ export class Buffer implements IBuffer {
       this.lines.maxLength = newMaxLength;
     }
 
+    // if (this._cols > newCols) {
+    //   console.log('increase!');
+    // }
+
     // The following adjustments should only happen if the buffer has been
     // initialized/filled.
     if (this.lines.length > 0) {

src/common/buffer/Marker.ts

@@ -3,9 +3,9 @@
  * @license MIT
  */
 
-import { EventEmitter } from 'common/EventEmitter';
 import { disposeArray } from 'common/Lifecycle';
 import { IDisposable, IMarker } from 'common/Types';
+import { Emitter } from 'vs/base/common/event';
 
 export class Marker implements IMarker {
   private static _nextId = 1;
@@ -16,7 +16,7 @@ export class Marker implements IMarker {
   private readonly _id: number = Marker._nextId++;
   public get id(): number { return this._id; }
 
-  private readonly _onDispose = this.register(new EventEmitter<void>());
+  private readonly _onDispose = this.register(new Emitter<void>());
   public readonly onDispose = this._onDispose.event;
 
   constructor(