CrIconButton: Remove unnecessary disable-ripple property

CrIconButton already contains a noink property to disable the ripple
effect.

Bug: 1128599
Change-Id: I18b503466ec2aee427119aa1041920b0d793266f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2446351
Commit-Queue: Roman Arora <romanarora@chromium.org>
Reviewed-by: John Lee <johntlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813478}

chrome/test/data/webui/cr_elements/cr_icon_button_tests.js

@@ -167,13 +167,4 @@ suite('cr-icon-button', function() {
     assertEquals('icon1', elements[0].icon);
     assertEquals('icon2', elements[1].icon);
   });
-
-  test('disable ripple property prevents showing ripple', () => {
-    document.body.innerHTML =
-        '<cr-icon-button disable-ripple></cr-icon-button>';
-    button = /** @type {!CrIconButtonElement} */ (
-        document.body.querySelector('cr-icon-button'));
-    button.focus();
-    assertFalse(button.hasRipple());
-  });
 });

ui/webui/resources/cr_elements/cr_icon_button/cr_icon_button.js

@@ -63,11 +63,6 @@ Polymer({
       observer: 'applyTabIndex_',
     },
 
-    disableRipple: {
-      type: Boolean,
-      value: false,
-    },
-
     ironIcon: {
       type: String,
       observer: 'onIronIconChanged_',
@@ -126,7 +121,7 @@ Polymer({
 
   /** @private */
   showRipple_() {
-    if (!this.noink && !this.disabled && !this.disableRipple) {
+    if (!this.noink && !this.disabled) {
       this.getRipple().showAndHoldDown();
       this.rippleShowing_ = true;
     }