Make "descriptors" argument of FontFace constructor optional

This reflects recent spec update.

spec: http://dev.w3.org/csswg/css-font-loading/#fontface-interface

BUG=
TEST=fast/css/font*

Review URL: https://codereview.chromium.org/335333002

git-svn-id: svn://svn.chromium.org/blink/trunk@176329 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/fast/css/fontface-arraybuffer.html

@@ -15,15 +15,15 @@ for (var i = 0; i < ahemString.length; i++) {
     uint8View[i] = ahemString.charCodeAt(i);
 }
 
-var face1 = new FontFace('FontFromArrayBuffer', buffer, {});
+var face1 = new FontFace('FontFromArrayBuffer', buffer);
 shouldBeEqualToString('face1.status', 'loaded');
 document.fonts.add(face1);
 
-var face2 = new FontFace('FontFromArrayBufferView', uint8View, {});
+var face2 = new FontFace('FontFromArrayBufferView', uint8View);
 shouldBeEqualToString('face2.status', 'loaded');
 document.fonts.add(face2);
 
-var face3 = new FontFace('FontFromEmptyArrayBuffer', new ArrayBuffer(0), {});
+var face3 = new FontFace('FontFromEmptyArrayBuffer', new ArrayBuffer(0));
 shouldBeEqualToString('face3.status', 'error');
 face3.load().catch(function(v) {
     rejectionValue = v;

third_party/WebKit/LayoutTests/fast/css/fontface-properties-expected.txt

@@ -32,7 +32,7 @@ PASS modifiedFace.unicodeRange is "U+0-3FF"
 PASS modifiedFace.variant is "small-caps"
 PASS modifiedFace.featureSettings is "'dlig' 1, 'liga' 0"
 
-PASS new FontFace('test', 'invalid_src', {}) threw exception SyntaxError: Failed to construct 'FontFace': The source provided ('invalid_src') could not be parsed as a value list..
+PASS new FontFace('test', 'invalid_src') threw exception SyntaxError: Failed to construct 'FontFace': The source provided ('invalid_src') could not be parsed as a value list..
 PASS face.style = '' threw exception SyntaxError: Failed to set the 'style' property on 'FontFace': Failed to set '' as a property value..
 PASS face.weight = 'a' threw exception SyntaxError: Failed to set the 'weight' property on 'FontFace': Failed to set 'a' as a property value..
 PASS face.unicodeRange = 'U+' threw exception SyntaxError: Failed to set the 'unicodeRange' property on 'FontFace': Failed to set 'U+' as a property value..

third_party/WebKit/LayoutTests/fast/css/fontface-properties.html

@@ -32,7 +32,7 @@ function runTests() {
     shouldBeEqualToString('ahemFace.featureSettings', "'dlig' 1");
 
     debug('');
-    defaultFace = new FontFace('defaultFace', 'local(foo)', {});
+    defaultFace = new FontFace('defaultFace', 'local(foo)');
     shouldBeEqualToString('defaultFace.family', 'defaultFace');
     shouldBeEqualToString('defaultFace.style', 'normal');
     shouldBeEqualToString('defaultFace.weight', 'normal');
@@ -57,7 +57,7 @@ function runTests() {
     shouldBeEqualToString('constructedFace.featureSettings', "'liga' 0");
 
     debug('');
-    modifiedFace = new FontFace('unmodified', 'local(baz)', {});
+    modifiedFace = new FontFace('unmodified', 'local(baz)');
     modifiedFace.family = 'modified';
     modifiedFace.style = 'italic';
     modifiedFace.weight = 900;
@@ -72,8 +72,8 @@ function runTests() {
     shouldBeEqualToString('modifiedFace.featureSettings', "'dlig' 1, 'liga' 0");
 
     debug('');
-    shouldThrow("new FontFace('test', 'invalid_src', {})");
-    face = new FontFace('test', 'local(foo)', {});
+    shouldThrow("new FontFace('test', 'invalid_src')");
+    face = new FontFace('test', 'local(foo)');
     shouldThrow("face.style = ''");
     shouldThrow("face.weight = 'a'");
     shouldThrow("face.unicodeRange = 'U+'");

third_party/WebKit/Source/core/css/FontFace.idl

@@ -39,9 +39,9 @@ enum FontFaceLoadStatus {
 
 [
     // FIXME: should be union type http://crbug.com/240176
-    Constructor(DOMString family, DOMString source, Dictionary descriptors),
-    Constructor(DOMString family, ArrayBuffer source, Dictionary descriptors),
-    Constructor(DOMString family, ArrayBufferView source, Dictionary descriptors),
+    Constructor(DOMString family, DOMString source, optional Dictionary descriptors),
+    Constructor(DOMString family, ArrayBuffer source, optional Dictionary descriptors),
+    Constructor(DOMString family, ArrayBufferView source, optional Dictionary descriptors),
     ConstructorCallWith=ExecutionContext,
     RaisesException=Constructor,
     RuntimeEnabled=FontLoadEvents,