Revert "Rename polymer and cr_elements v0_8 to v1_0"

third_party/polymer/v1_0/components-chromium/iron-a11y-announcer/README.md

Index: third_party/polymer/v1_0/components-chromium/iron-a11y-announcer/README.md
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-iron-a11y-announcer
-===================
-
-`iron-a11y-announcer` is a singleton element that is intended to add a11y
-to features that require on-demand announcement from screen readers. In
-order to make use of the announcer, it is best to request its availability
-in the announcing element.
-
-Example:
-
-    Polymer({
-      is: 'x-chatty',
-      attached: function() {
-        // This will create the singlton element if it has not
-        // been created yet:
-        Polymer.IronA11yAnnouncer.requestAvailability();
-      }
-    });
-    
-After the `iron-a11y-announcer` has been made available, elements can
-make announces by firing bubbling `iron-announce` events.
-
-Example:
-
-    this.fire('iron-announce', {
-      text: 'This is an announcement!'
-    }, { bubbles: true });
-    
-Note: announcements are only audible if you have a screen reader enabled.