debug: do not send breakpoints to adapter if file is dirty

fixes #2975

src/vs/workbench/parts/debug/common/debug.ts

@@ -233,7 +233,10 @@ export interface IDebugService extends ee.IEventEmitter {
 
 	setFocusedStackFrameAndEvaluate(focusedStackFrame: IStackFrame): void;
 
-	setBreakpointsForModel(modelUri: uri, data: IRawBreakpoint[]): TPromise<void>;
+	/**
+	 * Sets breakpoints for a model. Does not send them to the adapter.
+	 */
+	setBreakpointsForModel(modelUri: uri, rawData: IRawBreakpoint[]): void;
 	toggleBreakpoint(IRawBreakpoint): TPromise<void>;
 	enableOrDisableAllBreakpoints(enabled: boolean): TPromise<void>;
 	toggleEnablement(element: IEnablement): TPromise<void>;

src/vs/workbench/parts/debug/electron-browser/debugService.ts

@@ -394,12 +394,10 @@ export class DebugService extends ee.EventEmitter implements debug.IDebugService
 		}
 	}
 
-	public setBreakpointsForModel(modelUri: uri, rawData: debug.IRawBreakpoint[]): TPromise<void> {
+	public setBreakpointsForModel(modelUri: uri, rawData: debug.IRawBreakpoint[]): void {
 		this.model.removeBreakpoints(
 			this.model.getBreakpoints().filter(bp => bp.source.uri.toString() === modelUri.toString()));
 		this.model.addBreakpoints(rawData);
-
-		return this.sendBreakpoints(modelUri);
 	}
 
 	public toggleBreakpoint(rawBreakpoint: debug.IRawBreakpoint): TPromise<void> {