MD History: Implement search functionality.

chrome/browser/resources/md_history/history_card_manager.html

Index: chrome/browser/resources/md_history/history_card_manager.html
diff --git a/chrome/browser/resources/md_history/history_card_manager.html b/chrome/browser/resources/md_history/history_card_manager.html
index 7108a87abc6593da7befccbd5ac3cc9501c978e2..d33b9a76689bb0967f9216b5a5615aa0c986703e 100644
--- a/chrome/browser/resources/md_history/history_card_manager.html
+++ b/chrome/browser/resources/md_history/history_card_manager.html
@@ -17,6 +17,10 @@
         display: block;
       }
 
+      [hidden] {
+        display: none !important;
+      }
+
       #overflow-menu {
         @apply(--shadow-elevation-2dp);
         border-radius: 2px;
@@ -40,11 +44,27 @@
       paper-item:hover {
         background: #eaeaea;
       }
+
+      #no-results {
+        flex: 1;
+        align-items: center;
+        color: #b4b4b4;
+        display: flex;
+        font-size: 14px;
+        font-weight: 500;
+        justify-content: center;
+      }
     </style>
+    <div id="no-results"
+        hidden$="{{!noResultsAvailable_(historyDataByDay_.length, loading)}}">
+      {{noResultsMessage_(searchTerm)}}
+    </div>
     <iron-list items="{{historyDataByDay_}}" as="historyDay" id="infinite-list"
-        on-scroll="scrollHandler_">
+        on-scroll="scrollHandler_"
+        hidden$="{{noResultsAvailable_(historyDataByDay_.length, loading)}}">
       <template>
         <history-card history-date="{{historyDay.date}}"
+            search-term="[[searchTerm]]"
             history-items="{{historyDay.historyItems}}">
         </history-card>
       </template>