chore(wdpromise): prefer wdpromise.when to wdpromise.fulfilled (angular#4018)

Closes angular#3903

Author: sjelin

lib/browser.ts

@@ -694,7 +694,7 @@ export class ProtractorBrowser extends AbstractExtendedWebDriver {
 
     let runWaitForAngularScript: () => wdpromise.Promise<any> = () => {
       if (this.plugins_.skipAngularStability() || this.bpClient) {
-        return wdpromise.fulfilled();
+        return wdpromise.when(null);
       } else {
         // Need to wrap this so that we read rootEl in the control flow, not synchronously.
         return this.angularAppRoot().then((rootEl: string) => {
@@ -755,7 +755,7 @@ export class ProtractorBrowser extends AbstractExtendedWebDriver {
                       'return window.NG_PENDING_TIMEOUTS',
                       'Protractor.waitForAngular() - getting pending timeouts' + description);
                 } else {
-                  pendingTimeoutsPromise = wdpromise.fulfilled({});
+                  pendingTimeoutsPromise = wdpromise.when({});
                 }
                 let pendingHttpsPromise = this.executeScriptWithDescription(
                     clientSideScripts.getPendingHttpRequests,
@@ -1209,7 +1209,7 @@ export class ProtractorBrowser extends AbstractExtendedWebDriver {
   pause(opt_debugPort?: number): wdpromise.Promise<any> {
     if (this.debugHelper.isAttached()) {
       logger.info('Encountered browser.pause(), but debugger already attached.');
-      return wdpromise.fulfilled(true);
+      return wdpromise.when(true);
     }
     let debuggerClientPath = __dirname + '/debugger/clients/wddebugger.js';
     let onStartFn = (firstTime: boolean) => {

lib/debugger.ts

@@ -169,7 +169,7 @@ export class DebugHelper {
             res = 'Error while evaluating command: ' + e;
           }
           if (!wdpromise.isPromise(res)) {
-            res = wdpromise.fulfilled(res);
+            res = wdpromise.when(res);
           }
 
           return res.then((res: any) => {
@@ -237,7 +237,7 @@ export class DebugHelper {
    */
   private validatePortAvailability_(port: number): wdpromise.Promise<boolean> {
     if (this.debuggerValidated_) {
-      return wdpromise.fulfilled(false);
+      return wdpromise.when(false);
     }
 
     let doneDeferred = wdpromise.defer();

lib/element.ts

@@ -689,7 +689,7 @@ export class ElementArrayFinder extends WebdriverWebElement {
    *     value of the accumulator.
    */
   reduce(reduceFn: Function, initialValue: any): wdpromise.Promise<any> {
-    let valuePromise = wdpromise.fulfilled(initialValue);
+    let valuePromise = wdpromise.when(initialValue);
     return this.asElementFinders_().then((arr: ElementFinder[]) => {
       return arr.reduce((valuePromise: any, elementFinder: ElementFinder, index: number) => {
         return valuePromise.then((value: any) => {
@@ -863,7 +863,7 @@ export class ElementFinder extends WebdriverWebElement {
   static fromWebElement_(browser: ProtractorBrowser, webElem: WebElement, locator?: Locator):
       ElementFinder {
     let getWebElements = () => {
-      return wdpromise.fulfilled([webElem]);
+      return wdpromise.when([webElem]);
     };
     return new ElementArrayFinder(browser, getWebElements, locator).toElementFinder_();
   }

lib/runner.ts

@@ -258,7 +258,7 @@ export class Runner extends EventEmitter {
             });
 
     browser_.getProcessedConfig = () => {
-      return wdpromise.fulfilled(config);
+      return wdpromise.when(config);
     };
 
     browser_.forkNewDriverInstance = (opt_useSameUrl: boolean, opt_copyMockModules: boolean) => {