[MD Bookmarks] Add Select for Bookmarks.

chrome/browser/resources/md_bookmarks/item.html

Index: chrome/browser/resources/md_bookmarks/item.html
diff --git a/chrome/browser/resources/md_bookmarks/item.html b/chrome/browser/resources/md_bookmarks/item.html
index a00cb8f24bf136fa970ab0270719169f412fc3eb..08259ad10230aa527534ac50bb8f99795d4eea4b 100644
--- a/chrome/browser/resources/md_bookmarks/item.html
+++ b/chrome/browser/resources/md_bookmarks/item.html
@@ -10,12 +10,17 @@
     <style include="shared-style">
       :host {
         -webkit-padding-start: 20px;
+        -webkit-user-select: none;
         align-items: center;
         display: flex;
         flex-direction: row;
         height: 40px;
       }
 
+      :host([is-selected]) {
+        background-color: rgb(216, 223, 240);

[calamity, 2017/01/17 06:12:22]

Is this the right color? The spec says it should be rgba(66, 133, 244, 0.16) on
a white background, which ends up being 225, 235, 253.

[jiaxi, 2017/01/20 04:51:08]

Done.

+      }
+
       #website-title {
         color: var(--primary-text-color);
         cursor: pointer;