Part of this is going to be

void NativeThemeMac::PaintMenuItemBackground(
    cc::PaintCanvas* canvas,
    State state,
    const gfx::Rect& rect,
    const MenuItemExtraParams& menu_item) const {
  cc::PaintFlags flags;
  switch (state) {
    case NativeTheme::kNormal:
    case NativeTheme::kDisabled:
      // Draw nothing over the regular background.
      break;
    case NativeTheme::kHovered:
      // TODO(tapted): Draw a gradient, and use [NSColor currentControlTint] to
      // pick colors. The System color "selectedMenuItemColor" is actually still
      // blue for Graphite. And while "keyboardFocusIndicatorColor" does change,
      // and is a good shade of gray, it's not blue enough for the Blue theme.
      flags.setColor(GetSystemColor(kColorId_FocusedMenuItemBackgroundColor));
      canvas->drawRect(gfx::RectToSkRect(rect), flags);


Probably... we should still use a native menu for the wrench menu, and find a nice way to delegate the insertion of the custom NSView*s 

Long-term we may want to consider ditching NSMenu for the wrench menu completely and just making it a popup/bubble window the way most* other browsers do (.e.g similar to the profile switcher). This would allow us to:
 - enable drag&drop in the bookmarks submenu, which we currently can not do no Mac (but can on other platforms)
 - fix a11y issues with zoom/cut/copy/paste and the extension icon container
 - allow opening menus on the extension icons
 - make it pretty / add branding / promos

MacViews triage: assigning to sdy@ targeting M-68 as part of other menu work.

** Bulk Edit **

FYI: Starting 04/13 M68 will be in canary, M68 Dev promotion will be on 04/26.

This is Fixed as of <https://chromium-review.googlesource.com/c/chromium/src/+/998016>, which added logic for Graphite highlights.

Tried checking the issue on latest canary 68.0.3419.0 using Mac 10.13.1 with the below mentioned steps.
1. System Preferences > Appearance 
2. Changed Appearance to Graphite (...from Blue)
3. In chrome://flags enabled "ViewsBrowserWindows"
4. Hovered mouse over the wrench menu.
We observed grey highlighting in latest canary and also in one of the older versions(68.0.3397.0-Assuming this version as without the fix). Attaching the screen shots of both.

@ellyjones: Could you please have a look at the screen shots and let us know if we have missed anything in the process. Please help us in verifying the fix.

Deleted: 813819-3397.0.png 587 KB

	813819-3397.0.png 587 KB View Download

Deleted: 813819-3419.0.png 583 KB

	813819-3419.0.png 583 KB View Download

#10: yup, this bug got superseded by https://bugs.chromium.org/p/chromium/issues/detail?id=829467#c9 so this bug, while it was fixed in the past, is now obsolete. No need to verify.