Remove Float32ImageData and update ImageData for color management

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

Index: third_party/WebKit/Source/core/html/ImageDataColorSettings.idl
diff --git a/third_party/WebKit/Source/core/html/ImageDataColorSettings.idl b/third_party/WebKit/Source/core/html/ImageDataColorSettings.idl
new file mode 100644
index 0000000000000000000000000000000000000000..828808cc80581e7951705286cc4afbf6a6462b78
--- /dev/null
+++ b/third_party/WebKit/Source/core/html/ImageDataColorSettings.idl
@@ -0,0 +1,16 @@
+// 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#imageda
+
+enum ImageDataStorageFormat {
+  "uint8", // default
+  "uint16",
+  "float32",
+};
+
+dictionary ImageDataColorSettings {
+  CanvasColorSpace colorSpace = "srgb";
+  ImageDataStorageFormat storageFormat = "uint8";
+};