Update Polymer components.

third_party/polymer/components/iron-form/test/basic.html

Index: third_party/polymer/components/iron-form/test/basic.html
diff --git a/third_party/polymer/components/iron-form/test/basic.html b/third_party/polymer/components/iron-form/test/basic.html
index 09f39ed7fab6ca7a7b4fd3ab9c78a88e401f9e02..01e7ba6c424850b9489c1eb293bacbbff6169d0b 100644
--- a/third_party/polymer/components/iron-form/test/basic.html
+++ b/third_party/polymer/components/iron-form/test/basic.html
@@ -41,6 +41,8 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       <form is="iron-form">
         <input name="foo" value="bar">
         <input name="foo" value="barbar">
+        <input name="empty" value="">
+        <input name="empty" value="">
         <simple-element name="zig" value="zig"></simple-element>
         <simple-element name="zig" value="zag"></simple-element>
         <simple-element name="zig" value="zug"></simple-element>
@@ -88,6 +90,14 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
     </template>
   </test-fixture>
 
+  <test-fixture id="FormUnsetMethod">
+    <template>
+      <form is="iron-form" action="/responds_with_json">
+        <simple-element name="zig" value="zag"></simple-element>
+      </form>
+    </template>
+  </test-fixture>
+
   <test-fixture id="FormGet">
     <template>
       <form is="iron-form" action="/responds_with_json" method="get">
@@ -367,13 +377,16 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       f = fixture('Dupes');
 
       assert.equal(f._customElements.length, 3);
-      assert.equal(f.elements.length, 2);
+      assert.equal(f.elements.length, 4);
 
       var json = f.serialize();
-      assert.equal(Object.keys(json).length, 2);
+      assert.equal(Object.keys(json).length, 3);
       assert.equal(json['foo'].length, 2);
       assert.equal(json['foo'][0], 'bar');
       assert.equal(json['foo'][1], 'barbar');
+      assert.equal(json['empty'].length, 2);
+      assert.equal(json['empty'][0], '');
+      assert.equal(json['empty'][1], '');
       assert.equal(json['zig'].length, 3);
       assert.equal(json['zig'][0], 'zig');
       assert.equal(json['zig'][1], 'zag');
@@ -734,6 +747,30 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
       form.submit();
     });
 
+    test('can submit with method unset, defaults to method=get', function(done) {
+      form = fixture('FormUnsetMethod');
+
+      var submitted = false;
+      form.addEventListener('iron-form-submit', function() {
+        submitted = true;
+      });
+
+      form.addEventListener('iron-form-response', function(event) {
+        expect(this.request.method).to.be.equal('GET');
+        expect(submitted).to.be.equal(true);
+        expect(event.detail.url).to.contain('zig=zag');
+
+        var response = event.detail.response;
+        expect(response).to.be.ok;
+        expect(response).to.be.an('object');
+        expect(response.success).to.be.equal(true);
+        done();
+      });
+
+      form.submit();
+      server.respond();
+    });
+
     test('can submit with method=get', function(done) {
       form = fixture('FormGet');