refactor (calendarHeaderComponent) rename input of MatDatepicker

Author: Tobias Schweizer

src/demo-app/datepicker/datepicker-demo.html

@@ -11,7 +11,7 @@ <h2>Options</h2>
     <input matInput [matDatepicker]="minDatePicker" [(ngModel)]="minDate" placeholder="Min date"
         [disabled]="inputDisabled">
     <mat-datepicker-toggle matSuffix [for]="minDatePicker"></mat-datepicker-toggle>
-    <mat-datepicker #minDatePicker [touchUi]="touch" [disabled]="datepickerDisabled" [customCalendarHeaderComponent]="customHeader"></mat-datepicker>
+    <mat-datepicker #minDatePicker [touchUi]="touch" [disabled]="datepickerDisabled" [calendarHeaderComponent]="customHeader"></mat-datepicker>
   </mat-form-field>
   <mat-form-field>
     <input matInput [matDatepicker]="maxDatePicker" [(ngModel)]="maxDate" placeholder="Max date"

src/lib/datepicker/datepicker-content.html

@@ -9,5 +9,5 @@
     [selected]="datepicker._selected"
     (selectedChange)="datepicker._select($event)"
     (_userSelection)="datepicker.close()"
-    [headerComponent]="datepicker.customCalendarHeaderComponent">
+    [headerComponent]="datepicker.calendarHeaderComponent">
 </mat-calendar>

src/lib/datepicker/datepicker.ts

@@ -117,7 +117,7 @@ export class MatDatepickerContent<D> implements AfterContentInit {
 export class MatDatepicker<D> implements OnDestroy {
 
   /** An input indicating the type of the custom header component for the calendar, if set. */
-  @Input() customCalendarHeaderComponent: ComponentType<any>;
+  @Input() calendarHeaderComponent: ComponentType<any>;
 
   /** The date to open the calendar to initially. */
   @Input()