Revert "adding new custom drag event handler to allow event bubbling"

This reverts commit 39971e0.

src/vs/workbench/contrib/webview/browser/webviewElement.ts

@@ -34,7 +34,7 @@ import { loadLocalResource, WebviewResourceResponse } from 'vs/workbench/contrib
 import { WebviewThemeDataProvider } from 'vs/workbench/contrib/webview/browser/themeing';
 import { areWebviewContentOptionsEqual, IWebview, WebviewContentOptions, WebviewExtensionDescription, WebviewInitInfo, WebviewMessageReceivedEvent, WebviewOptions } from 'vs/workbench/contrib/webview/browser/webview';
 import { WebviewFindDelegate, WebviewFindWidget } from 'vs/workbench/contrib/webview/browser/webviewFindWidget';
-import { DragEvent, FromWebviewMessage, KeyEvent, ToWebviewMessage } from 'vs/workbench/contrib/webview/browser/webviewMessages';
+import { FromWebviewMessage, KeyEvent, ToWebviewMessage } from 'vs/workbench/contrib/webview/browser/webviewMessages';
 import { decodeAuthority, webviewGenericCspSource, webviewRootResourceAuthority } from 'vs/workbench/contrib/webview/common/webview';
 import { IWorkbenchEnvironmentService } from 'vs/workbench/services/environment/common/environmentService';
 import { CodeWindow } from 'vs/base/browser/window';
@@ -310,10 +310,6 @@ export class WebviewElement extends Disposable implements IWebview, WebviewFindD
 			this._startBlockingIframeDragEvents();
 		}));
 
-		this._register(this.on('drag', (event) => {
-			this.handleDragEvent('drag', event);
-		}));
-
 		if (initInfo.options.enableFindWidget) {
 			this._webviewFindWidget = this._register(instantiationService.createInstance(WebviewFindWidget, this));
 		}
@@ -701,17 +697,6 @@ export class WebviewElement extends Disposable implements IWebview, WebviewFindD
 		this.window?.dispatchEvent(emulatedKeyboardEvent);
 	}
 
-	private handleDragEvent(type: 'drag', event: DragEvent) {
-		// Create a fake KeyboardEvent from the data provided
-		const emulatedDragEvent = new DragEvent(type, event);
-		// Force override the target
-		Object.defineProperty(emulatedDragEvent, 'target', {
-			get: () => this.element,
-		});
-		// And re-dispatch
-		this.window?.dispatchEvent(emulatedDragEvent);
-	}
-
 	windowDidDragStart(): void {
 		// Webview break drag and dropping around the main window (no events are generated when you are over them)
 		// Work around this by disabling pointer events during the drag.