Update bower.json for Polymer elements and add PRESUBMIT.py

third_party/polymer/v1_0/components/iron-input/iron-input.html

Index: third_party/polymer/v1_0/components/iron-input/iron-input.html
diff --git a/third_party/polymer/v1_0/components/iron-input/iron-input.html b/third_party/polymer/v1_0/components/iron-input/iron-input.html
index 3d8cccbf70960058fce7f83680ae870c2978487e..da30882313b4e85e28c92eecb9a5db506ffc71bb 100644
--- a/third_party/polymer/v1_0/components/iron-input/iron-input.html
+++ b/third_party/polymer/v1_0/components/iron-input/iron-input.html
@@ -41,7 +41,7 @@ It may be desirable to only allow users to enter certain characters. You can use
 is separate from validation, and `allowed-pattern` does not affect how the input is validated.
 
     <!-- only allow characters that match [0-9] -->
-    <input is="iron-input" prevent-invaild-input allowed-pattern="[0-9]">
+    <input is="iron-input" prevent-invalid-input allowed-pattern="[0-9]">
 
 @hero hero.svg
 @demo demo/index.html
@@ -154,11 +154,16 @@ is separate from validation, and `allowed-pattern` does not affect how the input
       //   always matches the charCode.
       // None of this makes any sense.
 
-      var nonPrintable =
+      // For these keys, ASCII code == browser keycode.
+      var anyNonPrintable =
         (event.keyCode == 8)   ||  // backspace
+        (event.keyCode == 13)  ||  // enter
+        (event.keyCode == 27);     // escape
+
+      // For these keys, make sure it's a browser keycode and not an ASCII code.
+      var mozNonPrintable =
         (event.keyCode == 19)  ||  // pause
         (event.keyCode == 20)  ||  // caps lock
-        (event.keyCode == 27)  ||  // escape
         (event.keyCode == 45)  ||  // insert
         (event.keyCode == 46)  ||  // delete
         (event.keyCode == 144) ||  // num lock
@@ -166,7 +171,7 @@ is separate from validation, and `allowed-pattern` does not affect how the input
         (event.keyCode > 32 && event.keyCode < 41)   || // page up/down, end, home, arrows
         (event.keyCode > 111 && event.keyCode < 124); // fn keys
 
-      return !(event.charCode == 0 && nonPrintable);
+      return !anyNonPrintable && !(event.charCode == 0 && mozNonPrintable);
     },
 
     _onKeypress: function(event) {