chore(focus-origin-monitor): remove unused method parameter (#4636)

* Remove the unused `renderer` parameter in the `focusvia` method.

src/demo-app/style/style-demo.html

@@ -1,10 +1,10 @@
 <button #b class="demo-focusable" cdkMonitorElementFocus>focus me!</button>
 <button (click)="b.focus()">focus programmatically</button>
 
-<button (click)="fom.focusVia(b, renderer, 'mouse')">focusVia: mouse</button>
-<button (click)="fom.focusVia(b, renderer, 'touch')">focusVia: touch</button>
-<button (click)="fom.focusVia(b, renderer, 'keyboard')">focusVia: keyboard</button>
-<button (click)="fom.focusVia(b, renderer, 'program')">focusVia: program</button>
+<button (click)="fom.focusVia(b, 'mouse')">focusVia: mouse</button>
+<button (click)="fom.focusVia(b, 'touch')">focusVia: touch</button>
+<button (click)="fom.focusVia(b, 'keyboard')">focusVia: keyboard</button>
+<button (click)="fom.focusVia(b, 'program')">focusVia: program</button>
 
 <div>Active classes: {{b.classList}}</div>
 

src/lib/checkbox/checkbox.ts

@@ -372,7 +372,7 @@ export class MdCheckbox extends _MdCheckboxMixinBase
 
   /** Focuses the checkbox. */
   focus(): void {
-    this._focusOriginMonitor.focusVia(this._inputElement.nativeElement, this._renderer, 'keyboard');
+    this._focusOriginMonitor.focusVia(this._inputElement.nativeElement, 'keyboard');
   }
 
   _onInteractionEvent(event: Event) {

src/lib/core/style/focus-origin-monitor.spec.ts

@@ -131,7 +131,7 @@ describe('FocusOriginMonitor', () => {
   }));
 
   it('focusVia keyboard should simulate keyboard focus', async(() => {
-    focusOriginMonitor.focusVia(buttonElement, buttonRenderer, 'keyboard');
+    focusOriginMonitor.focusVia(buttonElement, 'keyboard');
     fixture.detectChanges();
 
     setTimeout(() => {
@@ -148,7 +148,7 @@ describe('FocusOriginMonitor', () => {
   }));
 
   it('focusVia mouse should simulate mouse focus', async(() => {
-    focusOriginMonitor.focusVia(buttonElement, buttonRenderer, 'mouse');
+    focusOriginMonitor.focusVia(buttonElement, 'mouse');
     fixture.detectChanges();
 
     setTimeout(() => {
@@ -165,7 +165,7 @@ describe('FocusOriginMonitor', () => {
   }));
 
   it('focusVia mouse should simulate mouse focus', async(() => {
-    focusOriginMonitor.focusVia(buttonElement, buttonRenderer, 'touch');
+    focusOriginMonitor.focusVia(buttonElement, 'touch');
     fixture.detectChanges();
 
     setTimeout(() => {
@@ -182,7 +182,7 @@ describe('FocusOriginMonitor', () => {
   }));
 
   it('focusVia program should simulate programmatic focus', async(() => {
-    focusOriginMonitor.focusVia(buttonElement, buttonRenderer, 'program');
+    focusOriginMonitor.focusVia(buttonElement, 'program');
     fixture.detectChanges();
 
     setTimeout(() => {

src/lib/core/style/focus-origin-monitor.ts

@@ -126,10 +126,9 @@ export class FocusOriginMonitor {
   /**
    * Focuses the element via the specified focus origin.
    * @param element The element to focus.
-   * @param renderer The renderer to use to invoke the focus method on the element.
    * @param origin The focus origin.
    */
-  focusVia(element: HTMLElement, renderer: Renderer2, origin: FocusOrigin): void {
+  focusVia(element: HTMLElement, origin: FocusOrigin): void {
     this._setOriginForCurrentEventQueue(origin);
     element.focus();
   }

src/lib/radio/radio.ts

@@ -462,7 +462,7 @@ export class MdRadioButton implements OnInit, AfterViewInit, OnDestroy {
 
   /** Focuses the radio button. */
   focus(): void {
-    this._focusOriginMonitor.focusVia(this._inputElement.nativeElement, this._renderer, 'keyboard');
+    this._focusOriginMonitor.focusVia(this._inputElement.nativeElement, 'keyboard');
   }
 
   /**

src/lib/slide-toggle/slide-toggle.ts

@@ -199,7 +199,7 @@ export class MdSlideToggle extends _MdSlideToggleMixinBase
 
   /** Focuses the slide-toggle. */
   focus() {
-    this._focusOriginMonitor.focusVia(this._inputElement.nativeElement, this._renderer, 'keyboard');
+    this._focusOriginMonitor.focusVia(this._inputElement.nativeElement, 'keyboard');
   }
 
   /** Whether the slide-toggle is checked. */