Remove third_party/polymer from .gitignore

third_party/polymer/v1_0/components/paper-behaviors/paper-button-behavior.html

Index: third_party/polymer/v1_0/components/paper-behaviors/paper-button-behavior.html
diff --git a/third_party/polymer/v1_0/components/paper-behaviors/paper-button-behavior.html b/third_party/polymer/v1_0/components/paper-behaviors/paper-button-behavior.html
deleted file mode 100644
index bbe508f3341c97ca4961d388b8a73c3443a46b60..0000000000000000000000000000000000000000
--- a/third_party/polymer/v1_0/components/paper-behaviors/paper-button-behavior.html
+++ /dev/null
@@ -1,56 +0,0 @@
-<!--
-@license
-Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
-This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-Code distributed by Google as part of the polymer project is also
-subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
--->
-
-<link rel="import" href="../polymer/polymer.html">
-<link rel="import" href="../iron-behaviors/iron-button-state.html">
-
-<script>
-
-  /** @polymerBehavior */
-  Polymer.PaperButtonBehaviorImpl = {
-
-    properties: {
-
-      _elevation: {
-        type: Number
-      }
-
-    },
-
-    observers: [
-      '_calculateElevation(focused, disabled, active, pressed, receivedFocusFromKeyboard)'
-    ],
-
-    hostAttributes: {
-      role: 'button',
-      tabindex: '0'
-    },
-
-    _calculateElevation: function() {
-      var e = 1;
-      if (this.disabled) {
-        e = 0;
-      } else if (this.active || this.pressed) {
-        e = 4;
-      } else if (this.receivedFocusFromKeyboard) {
-        e = 3;
-      }
-      this._elevation = e;
-    }
-  };
-
-  /** @polymerBehavior */
-  Polymer.PaperButtonBehavior = [
-    Polymer.IronButtonState,
-    Polymer.IronControlState,
-    Polymer.PaperButtonBehaviorImpl
-  ];
-
-</script>