[MD History] Disable clicks in the date header of cards.

This CL disables clicks in the date header of cards as this was causing
the first item to be selected when the date was clicked.

BUG=654998
NO_DEPENDENCY_CHECKS=true
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2420583003
Cr-Commit-Position: refs/heads/master@{#427288}

chrome/browser/resources/md_history/app.vulcanized.html

@@ -730,7 +730,7 @@ iron-icon {
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
-<if expr="not chromeos">
+<if expr="not chromeos and not is_android">
 @font-face {
   font-family: 'Roboto';
   font-style: normal;
@@ -3041,6 +3041,7 @@ button.more-vert-button div {
   --checked-color: rgb(68, 136, 255);
         display: block;
         outline: none;
+        pointer-events: none;
 }
 
 button {
@@ -3074,6 +3075,7 @@ button {
   align-items: center;
         display: flex;
         min-height: var(--item-height);
+        pointer-events: auto;
 }
 
 :host([is-card-start]) #item-container {

chrome/browser/resources/md_history/history_item.html

@@ -19,6 +19,7 @@
         --checked-color: rgb(68, 136, 255);
         display: block;
         outline: none;
+        pointer-events: none;
       }
 
       /** Unresolved paper-icon-button-light styles. */
@@ -53,6 +54,7 @@
         align-items: center;
         display: flex;
         min-height: var(--item-height);
+        pointer-events: auto;
       }
 
       :host([is-card-start]) #item-container {