Clean up NativeTheme (particularly CommonTheme).

chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm

 // Copyright 2014 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/profiles/profile_chooser_controller.h"
 
 #import <Carbon/Carbon.h>  // kVK_Return.
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
@@ skipping 830 matching lines @@
 - (void)setRightMarginSpacing:(int)rightMarginSpacing;
 @end
 
 @implementation BackgroundColorHoverButton
 
 - (id)initWithFrame:(NSRect)frameRect
   imageTitleSpacing:(int)imageTitleSpacing
     backgroundColor:(NSColor*)backgroundColor {
   if ((self = [super initWithFrame:frameRect])) {
     backgroundColor_.reset([backgroundColor retain]);
-    // Use a color from Aura, since this button is not trying to look like a
-    // native control.
-    SkColor hoverColor = ui::GetAuraColor(
-        ui::NativeTheme::kColorId_ButtonHoverBackgroundColor, nullptr);
+    // TODO(estade): share this with the Views version of this code.

[sky, 2016/10/03 16:12:05]

Why not move it now? Maybe in c/b/ui/profile_chooser_constants.h

[Evan Stade, 2016/10/03 19:46:44]

I suspect we want to refactor this code to make it go away completely. But sure,
I can put it there for now.

+    SkColor hoverColor = SkColorSetRGB(0xEA, 0xEA, 0xEA);
     hoverColor_.reset([skia::SkColorToSRGBNSColor(hoverColor) retain]);
 
     [self setBordered:NO];
     [self setFont:[NSFont labelFontOfSize:kTextFontSize]];
     [self setButtonType:NSMomentaryChangeButton];
 
     base::scoped_nsobject<CustomPaddingImageButtonCell> cell(
         [[CustomPaddingImageButtonCell alloc]
             initWithLeftMarginSpacing:kHorizontalSpacing
                     imageTitleSpacing:imageTitleSpacing]);
@@ skipping 2071 matching lines @@
 }
 
 - (bool)shouldShowGoIncognito {
   bool incognitoAvailable =
       IncognitoModePrefs::GetAvailability(browser_->profile()->GetPrefs()) !=
           IncognitoModePrefs::DISABLED;
   return incognitoAvailable && !browser_->profile()->IsGuestSession();
 }
 
 @end