Roll third_party/polymer.

third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container.html

Index: third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container.html
diff --git a/third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container.html b/third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container.html
index 3dd7c0035fb915466022db012bf9042e6b9218db..4cd3af69019ceaaeef1f6720eba48bf7c58b94bf 100644
--- a/third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container.html
+++ b/third_party/polymer/v1_0/components-chromium/paper-input/paper-input-container.html
@@ -23,6 +23,9 @@ For example:
       <input is="iron-input">
     </paper-input-container>
 
+Do not wrap <paper-input-contanter> around elements that already include it, such as <paper-input>.
+Doing so may cause events to bounce infintely between the container and its contained element.
+
 ### Listening for input changes
 
 By default, it listens for changes on the `bind-value` attribute on its children nodes and perform
@@ -41,6 +44,11 @@ compound input field like a social security number input. The custom input eleme
       <ssn-input class="paper-input-input"></ssn-input>
     </paper-input-container>
 
+
+If you're using a `<paper-input-container>` imperatively, it's important to make sure
+that you attach its children (the `iron-input` and the optional `label`) before you
+attach the `<paper-input-container>` itself, so that it can be set up correctly.
+
 ### Validation
 
 If the `auto-validate` attribute is set, the input container will validate the input and update