Work around for content select not supporting touch events on it's children.

ui/keyboard/resources/main.js

Index: ui/keyboard/resources/main.js
diff --git a/ui/keyboard/resources/main.js b/ui/keyboard/resources/main.js
index 69975f6c95bf3bad0db0dc8c1f0839367990c50e..4dba0d9375bbac4a14f81ec16739c79016ec97ab 100644
--- a/ui/keyboard/resources/main.js
+++ b/ui/keyboard/resources/main.js
@@ -53,6 +53,15 @@ function expandHTML(importedContent) {
 function flattenKeysets(content) {
   var importedContent = importHTML(content);
   expandHTML(importedContent);
+  var rows = importedContent.querySelectorAll('kb-row');
+  for (var i = 0 ; i < rows.length; i++) {
+    var allKeys = rows[i].children;
+    for (var j = 0; j< allKeys.length; j++) {
+      var weight = allKeys[j].getAttribute('weight');
+      if (weight)
+        allKeys[j].style.webkitBoxFlex = weight;
+    }
+  }
   return importedContent;
 }