Remove unused roles(EditableText, SplitGroup, GrowArea) from Chromium.

ui/accessibility/platform/ax_platform_node_mac.mm

Index: ui/accessibility/platform/ax_platform_node_mac.mm
diff --git a/ui/accessibility/platform/ax_platform_node_mac.mm b/ui/accessibility/platform/ax_platform_node_mac.mm
index cd859fd72fb2eb23aeab382cefd78c2deff67b8d..b2963034c27f7b60aae94e06001f92db7fb9adfd 100644
--- a/ui/accessibility/platform/ax_platform_node_mac.mm
+++ b/ui/accessibility/platform/ax_platform_node_mac.mm
@@ -51,14 +51,12 @@ RoleMap BuildRoleMap() {
       {ui::AX_ROLE_DISCLOSURE_TRIANGLE, NSAccessibilityDisclosureTriangleRole},
       {ui::AX_ROLE_DIV, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DOCUMENT, NSAccessibilityGroupRole},
-      {ui::AX_ROLE_EDITABLE_TEXT, NSAccessibilityTextFieldRole},
       {ui::AX_ROLE_FIGCAPTION, NSAccessibilityGroupRole},
       {ui::AX_ROLE_FIGURE, NSAccessibilityGroupRole},
       {ui::AX_ROLE_FOOTER, NSAccessibilityGroupRole},
       {ui::AX_ROLE_FORM, NSAccessibilityGroupRole},
       {ui::AX_ROLE_GRID, NSAccessibilityGridRole},
       {ui::AX_ROLE_GROUP, NSAccessibilityGroupRole},
-      {ui::AX_ROLE_GROW_AREA, NSAccessibilityGrowAreaRole},
       {ui::AX_ROLE_HEADING, @"AXHeading"},
       {ui::AX_ROLE_IFRAME, NSAccessibilityGroupRole},
       {ui::AX_ROLE_IGNORED, NSAccessibilityUnknownRole},
@@ -107,7 +105,6 @@ RoleMap BuildRoleMap() {
       {ui::AX_ROLE_SLIDER_THUMB, NSAccessibilityValueIndicatorRole},
       {ui::AX_ROLE_SPIN_BUTTON, NSAccessibilityIncrementorRole},
       {ui::AX_ROLE_SPLITTER, NSAccessibilitySplitterRole},
-      {ui::AX_ROLE_SPLIT_GROUP, NSAccessibilitySplitGroupRole},
       {ui::AX_ROLE_STATIC_TEXT, NSAccessibilityStaticTextRole},
       {ui::AX_ROLE_STATUS, NSAccessibilityGroupRole},
       {ui::AX_ROLE_SVG_ROOT, NSAccessibilityGroupRole},