Web Animations: Allow animations with delay to start on compositor

Source/core/css/resolver/AnimatedStyleBuilder.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 327 matching lines @@
         return;
     case CSSPropertyClip:
         style->setClip(animatableValueToLengthBox(value, state));
         style->setHasClip(true);
         return;
     case CSSPropertyColor:
         style->setColor(toAnimatableColor(value)->color());
         style->setVisitedLinkColor(toAnimatableColor(value)->visitedLinkColor());
         return;
     case CSSPropertyFillOpacity:
-        // Avoiding a value of 1 forces a layer to be created.
-        style->setFillOpacity(clampTo<float>(toAnimatableDouble(value)->toDouble(), 0, nextafterf(1, 0)));
+        style->setFillOpacity(clampTo<float>(toAnimatableDouble(value)->toDouble(), 0, 1));
         return;
     case CSSPropertyFill:
         {
             const AnimatableSVGPaint* svgPaint = toAnimatableSVGPaint(value);
             style->accessSVGStyle()->setFillPaint(svgPaint->paintType(), svgPaint->color(), svgPaint->uri());
         }
         return;
     case CSSPropertyFlexGrow:
         style->setFlexGrow(clampTo<float>(toAnimatableDouble(value)->toDouble(), 0));
         return;
@@ skipping 212 matching lines @@
     case CSSPropertyShapeMargin:
         style->setShapeMargin(animatableValueToLength(value, state, NonNegativeValues));
         return;
     case CSSPropertyShapeImageThreshold:
         style->setShapeImageThreshold(clampTo<float>(toAnimatableDouble(value)->toDouble(), 0, 1));
         return;
     case CSSPropertyWebkitTextStrokeColor:
         style->setTextStrokeColor(toAnimatableColor(value)->color());
         style->setVisitedLinkTextStrokeColor(toAnimatableColor(value)->visitedLinkColor());
         return;
-    case CSSPropertyWebkitTransform: {
-        const TransformOperations& operations = toAnimatableTransform(value)->transformOperations();
-        // FIXME: Using identity matrix here when the transform list is empty
-        // forces a layer to be created in the presence of a transform animation.
-        style->setTransform(operations.size() ? operations : TransformOperations(true));
+    case CSSPropertyWebkitTransform:
+        style->setTransform(toAnimatableTransform(value)->transformOperations());
         return;
-    }
     case CSSPropertyWebkitTransformOriginX:
         style->setTransformOriginX(animatableValueToLength(value, state));
         return;
     case CSSPropertyWebkitTransformOriginY:
         style->setTransformOriginY(animatableValueToLength(value, state));
         return;
     case CSSPropertyWebkitTransformOriginZ:
         style->setTransformOriginZ(toAnimatableDouble(value)->toDouble());
         return;
     case CSSPropertyWidows:
@@ skipping 13 matching lines @@
         return;
     case CSSPropertyZoom:
         style->setZoom(clampTo<float>(toAnimatableDouble(value)->toDouble(), std::numeric_limits<float>::denorm_min()));
         return;
     default:
         ASSERT_NOT_REACHED();
     }
 }
 
 } // namespace WebCore