For some vector icons, get the size from the vector definition.

chrome/browser/ui/views/toolbar/wrench_toolbar_button.cc

 // Copyright 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.
 
 #include "chrome/browser/ui/views/toolbar/wrench_toolbar_button.h"
 
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/time/time.h"
@@ skipping 121 matching lines @@
       color = gfx::kGoogleGreen700;
       break;
     case WrenchIconPainter::SEVERITY_MEDIUM:
       color = gfx::kGoogleYellow700;
       break;
     case WrenchIconPainter::SEVERITY_HIGH:
       color = gfx::kGoogleRed700;
       break;
   }
 
-  // TODO(estade): find a home for this constant.
-  const int kButtonSize = 16;
-  SetImage(views::Button::STATE_NORMAL,
-           gfx::CreateVectorIcon(gfx::VectorIconId::BROWSER_TOOLS, kButtonSize,
-                                 color));
+  SetImage(
+      views::Button::STATE_NORMAL,
+      gfx::CreatePrimaryVectorIcon(gfx::VectorIconId::BROWSER_TOOLS, color));
 }
 
 const char* WrenchToolbarButton::GetClassName() const {
   return "WrenchToolbarButton";
 }
 
 bool WrenchToolbarButton::GetDropFormats(
     int* formats,
     std::set<ui::Clipboard::FormatType>* format_types) {
   return allow_extension_dragging_ ?
@@ skipping 42 matching lines @@
 
 void WrenchToolbarButton::OnPaint(gfx::Canvas* canvas) {
   views::MenuButton::OnPaint(canvas);
   if (ui::MaterialDesignController::IsModeMaterial())
     return;
   wrench_icon_painter_->Paint(canvas,
                               GetThemeProvider(),
                               gfx::Rect(size()),
                               WrenchIconPainter::BEZEL_NONE);
 }