Remove a bunch of pre-MD toolbar code and assets.

chrome/browser/ui/cocoa/toolbar/app_toolbar_button_cell.mm

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/toolbar/app_toolbar_button_cell.h"
 
 #include "base/macros.h"
 #import "chrome/browser/ui/cocoa/themed_window.h"
 #include "ui/gfx/canvas_skia_paint.h"
 #include "ui/gfx/geometry/rect.h"
 
-class AppMenuIconPainterDelegateMac : public AppMenuIconPainter::Delegate {
- public:
-  explicit AppMenuIconPainterDelegateMac(NSCell* cell) : cell_(cell) {}
-  ~AppMenuIconPainterDelegateMac() override {}
-
-  void ScheduleAppMenuIconPaint() override {
-    [[cell_ controlView] setNeedsDisplay:YES];
-  }
-
- private:
-  NSCell* cell_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppMenuIconPainterDelegateMac);
-};
-
 @interface AppToolbarButtonCell ()
 - (void)commonInit;
-- (AppMenuIconPainter::BezelType)currentBezelType;
 @end
 
 @implementation AppToolbarButtonCell
 
 - (id)initTextCell:(NSString*)text {
   if ((self = [super initTextCell:text])) {
     [self commonInit];
   }
   return self;
 }
 
 - (id)initWithCoder:(NSCoder*)decoder {
   if ((self = [super initWithCoder:decoder])) {
     [self commonInit];
   }
   return self;
 }
 
 - (void)drawWithFrame:(NSRect)cellFrame inView:(NSView*)controlView {
   gfx::CanvasSkiaPaint canvas(cellFrame, false);
   canvas.set_composite_alpha(true);

[Elly Fong-Jones, 2016/09/30 11:09:59]

The overall effect of this method is now to apply the result of
imageAlphaForWindowState: to the entire canvas, right?

[Evan Stade, 2016/09/30 17:20:06]

I don't think AppToolbarButtonCell is used or needs to continue to exist (I
mentioned this previously, perhaps it got lost in the shuffle). It's just a
placeholder right now in the nib which gets replaced by AppToolbarButton.

Thus I don't think it matters what this function does.

   canvas.SaveLayerAlpha(255 *
                         [self imageAlphaForWindowState:[controlView window]]);
-  const ui::ThemeProvider* themeProvider = [[controlView window] themeProvider];
-  if (themeProvider) {
-    iconPainter_->Paint(&canvas, [[controlView window] themeProvider],
-                        gfx::Rect(NSRectToCGRect(cellFrame)),
-                        [self currentBezelType]);
-  }
+
   canvas.Restore();
 }
 
-- (void)setSeverity:(AppMenuIconPainter::Severity)severity
-      shouldAnimate:(BOOL)shouldAnimate {
-  iconPainter_->SetSeverity(severity, shouldAnimate);
-}
-
 - (void)commonInit {
-  delegate_.reset(new AppMenuIconPainterDelegateMac(self));
-  iconPainter_.reset(new AppMenuIconPainter(delegate_.get()));
-}
-
-- (AppMenuIconPainter::BezelType)currentBezelType {
-  if ([self isHighlighted])
-    return AppMenuIconPainter::BEZEL_PRESSED;
-  if ([self isMouseInside])
-    return AppMenuIconPainter::BEZEL_HOVER;
-  return AppMenuIconPainter::BEZEL_NONE;
 }
 
 @end