history: fix tappable blank space at the end of history entries.

R=estade@chromium.org
BUG=407539

Review URL: https://codereview.chromium.org/594403004

Cr-Commit-Position: refs/heads/master@{#296650}

chrome/browser/resources/history/history.js

@@ -204,12 +204,14 @@ Visit.prototype.getResultDOM = function(propertyBag) {
     if (focusless)
       checkbox.tabIndex = -1;
 
+    if (!isMobileVersion()) {
       // Clicking anywhere in the entryBox will check/uncheck the checkbox.
       entryBox.setAttribute('for', checkbox.id);
       entryBox.addEventListener('mousedown', entryBoxMousedown);
       entryBox.addEventListener('click', entryBoxClick);
       entryBox.addEventListener('keydown', this.handleKeydown_.bind(this));
     }
+  }
 
   // Keep track of the drop down that triggered the menu, so we know
   // which element to apply the command to.