Implement Material Design for Mac toolbar.

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

+// Copyright 2016 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.h"
+
+#include "base/macros.h"
+#import "chrome/browser/ui/cocoa/themed_window.h"
+#import "chrome/browser/ui/cocoa/view_id_util.h"
+
+class AppMenuButtonIconPainterDelegateMac :
+    public AppMenuIconPainter::Delegate {
+ public:
+  explicit AppMenuButtonIconPainterDelegateMac(NSButton* button) :
+      button_(button) {}
+  ~AppMenuButtonIconPainterDelegateMac() override {}
+
+  void ScheduleAppMenuIconPaint() override {
+    [button_ setNeedsDisplay:YES];
+  }
+
+ private:
+  NSButton* button_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppMenuButtonIconPainterDelegateMac);
+};
+
+@interface AppToolbarButton ()
+- (void)commonInit;
+@end
+
+@implementation AppToolbarButton
+
+- (instancetype)initWithFrame:(NSRect)frame {
+  if ((self = [super initWithFrame:frame])) {
+    [self commonInit];
+  }
+  return self;
+}
+
+- (void)awakeFromNib {
+  [self commonInit];
+}
+
+- (void)commonInit {
+  view_id_util::SetID(self, VIEW_ID_APP_MENU);
+  delegate_.reset(new AppMenuButtonIconPainterDelegateMac(self));
+  severity_ = AppMenuIconPainter::Severity::SEVERITY_NONE;
+}
+
+- (SkColor)iconColor:(BOOL)themeIsDark {
+  const SkColor normalColor = SkColorSetRGB(0x5A, 0x5A, 0x5A);
+  const SkColor normalIncognitoColor = SkColorSetRGB(0xFF, 0xFF, 0xFF);
+  const SkColor severityMedColor = SkColorSetRGB(0xF0, 0x93, 0x00);
+  const SkColor severityMedIncognitoColor = SkColorSetRGB(0xF7, 0xCB, 0x4D);
+  const SkColor severityHighColor = SkColorSetRGB(0xC5, 0x39, 0x29);
+  const SkColor severityHighIncognitoColor = SkColorSetRGB(0xE6, 0x73, 0x7C);
+
+  switch (severity_) {
+    case AppMenuIconPainter::Severity::SEVERITY_NONE:
+    case AppMenuIconPainter::Severity::SEVERITY_LOW:
+      return themeIsDark ? normalIncognitoColor : normalColor;
+      break;
+
+    case AppMenuIconPainter::Severity::SEVERITY_MEDIUM:
+      return themeIsDark ? severityMedIncognitoColor : severityMedColor;
+      break;
+
+    case AppMenuIconPainter::Severity::SEVERITY_HIGH:
+      return themeIsDark ? severityHighIncognitoColor : severityHighColor;
+      break;
+
+    default:
+      break;
+  }
+}
+
+- (void)setSeverity:(AppMenuIconPainter::Severity)severity
+      shouldAnimate:(BOOL)shouldAnimate {
+  if (severity != severity_) {
+    severity_ = severity;
+    [self setImagesFromIconId:gfx::VectorIconId::BROWSER_TOOLS];
+    [self setNeedsDisplay:YES];
+  }
+}
+
+@end