[MD settings] updating polymer to 1.1.13

third_party/polymer/v1_0/components-chromium/paper-tooltip/README.md

Index: third_party/polymer/v1_0/components-chromium/paper-tooltip/README.md
diff --git a/third_party/polymer/v1_0/components-chromium/paper-tooltip/README.md b/third_party/polymer/v1_0/components-chromium/paper-tooltip/README.md
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--- a/third_party/polymer/v1_0/components-chromium/paper-tooltip/README.md
+++ b/third_party/polymer/v1_0/components-chromium/paper-tooltip/README.md
@@ -1,4 +1,28 @@
 # paper-tooltip
 
-`<paper-tooltip>` is a Material Design label that appears when the user hovers
-over an element with the cursor, or focuses the element with the keyboard.
+`<paper-tooltip>` is a label that appears on hover and focus when the user
+hovers over an element with the cursor or with the keyboard. It will be centered
+to an anchor element specified in the `for` attribute, or, if that doesn't exist,
+centered to the parent node containing it.
+Example:
+
+```html
+    <div style="display:inline-block">
+      <button>Click me!</button>
+      <paper-tooltip>Tooltip text</paper-tooltip>
+    </div>
+    <div>
+      <button id="btn">Click me!</button>
+      <paper-tooltip for="btn">Tooltip text</paper-tooltip>
+    </div>
+```
+
+### Styling
+The following custom properties and mixins are available for styling:
+
+Custom property | Description | Default
+----------------|-------------|----------
+`--paper-tooltip-background` | The background color of the tooltip | `#616161`
+`--paper-tooltip-opacity` | The opacity of the tooltip | `0.9`
+`--paper-tooltip-text-color` | The text color of the tooltip | `white`
+`--paper-tooltip` | Mixin applied to the tooltip | `{}`