Enable eye dropper feature on Win and Mac.

This CL enables the eye dropper feature on Windows and Mac.

Bug: 992297
Change-Id: I3ebe0e8526fda49f7956af4e3fe8fd2ea5cdb73d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2412598Reviewed-by: Mason Freed <masonfreed@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Ionel Popescu <iopopesc@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#814291}

content/test/data/accessibility/html/input-color-with-popup-open-expected-blink.txt

+#<skip - crbug.com/992297: the accessibility tree is different on Linux>
 rootWebArea
 ++genericContainer ignored
 ++++genericContainer
@@ -11,7 +12,7 @@ rootWebArea
 ++++++++++++++++++++genericContainer
 ++++++++++++++++++++++slider horizontal name='Color well' roleDescription='Color well with two-dimensional slider for selecting saturation and lightness' value='X: 227, Y: 0' valueForRange=227.00 minValueForRange=0.00 maxValueForRange=32016.00
 ++++++++++++++++++++genericContainer
-++++++++++++++++++++++genericContainer ignored invisible
+++++++++++++++++++++++genericContainer
 ++++++++++++++++++++++genericContainer ignored invisible
 ++++++++++++++++++++++genericContainer
 ++++++++++++++++++++++++slider horizontal name='Hue slider' valueForRange=116.00 minValueForRange=0.00 maxValueForRange=129.00

content/test/data/accessibility/html/input-color-with-popup-open-expected-mac.txt

@@ -7,6 +7,7 @@ AXWebArea AXRoleDescription='HTML content'
 ++++++++++++AXSlider AXDescription='Color well' AXRoleDescription='Color well with two-dimensional slider for selecting saturation and lightness' AXValue=227
 ++++++++++AXGroup AXRoleDescription='group'
 ++++++++++++AXGroup AXRoleDescription='group'
+++++++++++++AXGroup AXRoleDescription='group'
 ++++++++++++++AXSlider AXDescription='Hue slider' AXRoleDescription='slider' AXValue=116
 ++++++++++AXTextField AXDescription='Red channel' AXRoleDescription='text field' AXValue='255'
 ++++++++++AXTextField AXDescription='Green channel' AXRoleDescription='text field' AXValue='153'

content/test/data/accessibility/html/input-color-with-popup-open-expected-uia-win.txt

@@ -8,6 +8,7 @@ Document
 ++++++++++++++Slider Name='Color well' RangeValue.IsReadOnly=false RangeValue.LargeChange=0.00 RangeValue.SmallChange=0.00 RangeValue.Maximum=32016.00 RangeValue.Minimum=0.00 RangeValue.Value=227.00 Value.Value='X: 227, Y: 0'
 ++++++++++++Group IsControlElement=false
 ++++++++++++++Group
+++++++++++++++Group
 ++++++++++++++++Slider Name='Hue slider' RangeValue.IsReadOnly=false RangeValue.LargeChange=0.00 RangeValue.SmallChange=0.00 RangeValue.Maximum=129.00 RangeValue.Minimum=0.00 RangeValue.Value=116.00 Value.Value='116'
 ++++++++++++Edit Name='Red channel' Value.Value='255'
 ++++++++++++Edit Name='Green channel' Value.Value='153'

content/test/data/accessibility/html/input-color-with-popup-open-expected-win.txt

@@ -5,7 +5,8 @@ ROLE_SYSTEM_DOCUMENT READONLY FOCUSABLE ia2_hypertext='<obj0>'
 ++++++++IA2_ROLE_SECTION ia2_hypertext='<obj0><obj1><obj2><obj3><obj4><obj5><obj6>'
 ++++++++++IA2_ROLE_SECTION ia2_hypertext='<obj0>'
 ++++++++++++ROLE_SYSTEM_SLIDER name='Color well' value='X: 227, Y: 0' FOCUSABLE IA2_STATE_HORIZONTAL localized_extended_role='Color well with two-dimensional slider for selecting saturation and lightness'
-++++++++++IA2_ROLE_SECTION ia2_hypertext='<obj0>'
+++++++++++IA2_ROLE_SECTION ia2_hypertext='<obj0><obj1>'
+++++++++++++IA2_ROLE_SECTION FOCUSABLE
 ++++++++++++IA2_ROLE_SECTION ia2_hypertext='<obj0>'
 ++++++++++++++ROLE_SYSTEM_SLIDER name='Hue slider' value='116' FOCUSABLE IA2_STATE_HORIZONTAL
 ++++++++++ROLE_SYSTEM_TEXT name='Red channel' value='255' FOCUSABLE ia2_hypertext='255'

third_party/blink/web_tests/fast/forms/color/color-picker-tab-navigation-expected.txt

 Popup opened.
+EYE-DROPPER
 COLOR-SELECTION-RING
 RVALUECONTAINER
 GVALUECONTAINER
@@ -7,6 +8,7 @@ FORMAT-TOGGLER
 COLOR-SELECTION-RING
 FORMAT-TOGGLER clicked. Active color format changed.
 COLOR-SELECTION-RING
+EYE-DROPPER
 COLOR-SELECTION-RING
 HVALUECONTAINER
 SVALUECONTAINER
@@ -14,6 +16,7 @@ LVALUECONTAINER
 FORMAT-TOGGLER
 FORMAT-TOGGLER clicked. Active color format changed.
 COLOR-SELECTION-RING
+EYE-DROPPER
 COLOR-SELECTION-RING
 HEXVALUECONTAINER
 FORMAT-TOGGLER

third_party/blink/web_tests/platform/linux/fast/forms/color/color-picker-tab-navigation-expected.txt

+Popup opened.
+COLOR-SELECTION-RING
+RVALUECONTAINER
+GVALUECONTAINER
+BVALUECONTAINER
+FORMAT-TOGGLER
+COLOR-SELECTION-RING
+FORMAT-TOGGLER clicked. Active color format changed.
+COLOR-SELECTION-RING
+COLOR-SELECTION-RING
+HVALUECONTAINER
+SVALUECONTAINER
+LVALUECONTAINER
+FORMAT-TOGGLER
+FORMAT-TOGGLER clicked. Active color format changed.
+COLOR-SELECTION-RING
+COLOR-SELECTION-RING
+HEXVALUECONTAINER
+FORMAT-TOGGLER
+TEST COMPLETE

ui/base/ui_base_features.cc

@@ -157,9 +157,16 @@ bool IsForcedColorsEnabled() {
   return forced_colors_enabled;
 }
 
-// Enables the eye-dropper in the refresh color-picker.
-const base::Feature kEyeDropper{"EyeDropper",
-                                base::FEATURE_DISABLED_BY_DEFAULT};
+// Enables the eye-dropper in the refresh color-picker for Windows and Mac.
+// This feature will be released for other platforms in later milestones.
+const base::Feature kEyeDropper {
+  "EyeDropper",
+#if defined(OS_WIN) || defined(OS_MAC)
+      base::FEATURE_ENABLED_BY_DEFAULT
+#else
+      base::FEATURE_DISABLED_BY_DEFAULT
+#endif
+};
 
 bool IsEyeDropperEnabled() {
   return IsFormControlsRefreshEnabled() &&