Implement canvas color space IDL format for 2D canvas

third_party/WebKit/Source/core/html/canvas/CanvasContextCreationAttributes.idl

Index: third_party/WebKit/Source/core/html/canvas/CanvasContextCreationAttributes.idl
diff --git a/third_party/WebKit/Source/core/html/canvas/CanvasContextCreationAttributes.idl b/third_party/WebKit/Source/core/html/canvas/CanvasContextCreationAttributes.idl
index 5063c92163f2fff9a292c61ca80ba7058f2f8f36..56bf5517e34e49d090e26fd229ddd48834ec7707 100644
--- a/third_party/WebKit/Source/core/html/canvas/CanvasContextCreationAttributes.idl
+++ b/third_party/WebKit/Source/core/html/canvas/CanvasContextCreationAttributes.idl
@@ -21,14 +21,29 @@
 //
 // N.B.: Web IDL doesn't support multiple inheritance of dictionaries.
 
+enum CanvasColorSpace {
+    "legacy-srgb", // default

[Justin Novosad, 2017/02/23 18:48:13]

The revised proposal removes legacy srgb.  Basically, "srgb" matches the color
space used for CSS, so basically the color correct rendering  flag determines
whether or not we're in legacy mode.

[zakerinasab, 2017/02/23 20:22:33]

Done.

+    "srgb",
+    "rec2020",
+    "p3",
+};
 
-enum CanvasColorSpace { "legacy-srgb", "srgb", "linear-rgb", "rec-2020", "p3"};
+enum CanvasPixelFormat {
+    "8-8-8-8", // default
+    "10-10-10-2",
+    "12-12-12-12",
+    "float16",
+};
 
 [PermissiveDictionaryConversion]
 dictionary CanvasContextCreationAttributes {
     // Canvas 2D attributes
     boolean alpha = true;  // Also used for WebGL.
+    // TODO(crbug.com/637288): Do we keep "legacy-srgb" as the default?
+    // Must decide before shipping.
     [RuntimeEnabled=ExperimentalCanvasFeatures] CanvasColorSpace colorSpace = "legacy-srgb";
+    [RuntimeEnabled=ExperimentalCanvasFeatures] CanvasPixelFormat pixelFormat = "8-8-8-8";
+    [RuntimeEnabled=ExperimentalCanvasFeatures] boolean linearPixelMath = false;
 
     // WebGL attributes
     boolean depth = true;