Clean-up after migration from ax_enums.idl to ax_enums.mojom

The idl file should be removed, and a couple of comments got missed.

TBR=dcheng@chromium.org

Bug: 650275
Change-Id: Ic36c71da5234bd9f0808f005c967147a11e45e27
Reviewed-on: https://chromium-review.googlesource.com/889043Reviewed-by: Aaron Leventhal <aleventhal@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532590}

ui/accessibility/ax_enums.mojom

@@ -452,7 +452,7 @@ enum IntAttribute {
   kSetSize,
   kPosInSet,
 
-   // In the case of AX_ROLE_COLOR_WELL, specifies the selected color.
+   // In the case of Role::kColorWell, specifies the selected color.
   kColorValue,
 
    // Indicates the element that represents the current item within a container
@@ -571,10 +571,10 @@ enum IntListAttribute {
 
    // For inline text. This is the pixel position of the end of this
    // character within the bounding rectangle of this object, in the
-   // direction given by AX_ATTR_TEXT_DIRECTION. For example, for left-to-right
-   // text, the first offset is the right coordinate of the first character
-   // within the object's bounds, the second offset is the right coordinate
-   // of the second character, and so on.
+   // direction given by StringAttribute::kTextDirection. For example,
+   // for left-to-right text, the first offset is the right coordinate of
+   // the first character within the object's bounds, the second offset
+   // is the right coordinate of the second character, and so on.
   kCharacterOffsets,
 
    // Used for caching. Do not read directly. Use

ui/views/controls/combobox/combobox.cc

@@ -766,8 +766,8 @@ void Combobox::OnBlur() {
 }
 
 void Combobox::GetAccessibleNodeData(ui::AXNodeData* node_data) {
-  // AX_ROLE_COMBO_BOX is for UI elements with a dropdown and an editable text
-  // field, which views::Combobox does not have. Use
+  // ax::mojom::Role::kComboBox is for UI elements with a dropdown and
+  // an editable text field, which views::Combobox does not have. Use
   // ax::mojom::Role::kPopUpButton to match an HTML <select> element.
   node_data->role = ax::mojom::Role::kPopUpButton;