Remove Float32ImageData and update ImageData for color management

third_party/WebKit/Source/core/html/Float32ImageData.idl

-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// https://github.com/junov/CanvasColorSpace/blob/master/CanvasColorSpaceProposal.md#imagedata
-
-[
-    Constructor(unsigned long sw, unsigned long sh),
-    Constructor(unsigned long sw, unsigned long sh, ImageDataColorSpace colorSpace),
-    Constructor(Float32Array data, unsigned long sw),
-    Constructor(Float32Array data, unsigned long sw, unsigned long sh),
-    Constructor(Float32Array data, unsigned long sw, unsigned long sh, ImageDataColorSpace colorSpace),
-
-    Exposed=(Window,Worker),
-    RaisesException=Constructor,
-    RuntimeEnabled=ExperimentalCanvasFeatures,
-] interface Float32ImageData {
-    readonly attribute unsigned long width;
-    readonly attribute unsigned long height;
-    readonly attribute Float32Array data;
-    readonly attribute ImageDataColorSpace colorSpace;
-};