Fix the Material Design infobar icons size

components/infobars/core/infobar_delegate.cc

 // 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.
 
 #include "components/infobars/core/infobar_delegate.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "components/infobars/core/infobar.h"
 #include "components/infobars/core/infobar_manager.h"
@@ skipping 28 matching lines @@
 
 gfx::VectorIconId InfoBarDelegate::GetVectorIconId() const {
   return gfx::VectorIconId::VECTOR_ICON_NONE;
 }
 
 gfx::Image InfoBarDelegate::GetIcon() const {
 #if !defined(OS_MACOSX) && !defined(OS_IOS) && !defined(OS_ANDROID)
   if (ui::MaterialDesignController::IsModeMaterial()) {
     gfx::VectorIconId vector_id = GetVectorIconId();
     if (vector_id != gfx::VectorIconId::VECTOR_ICON_NONE) {
-      return gfx::Image(gfx::CreateVectorIcon(vector_id, 18,
+      return gfx::Image(gfx::CreateVectorIcon(vector_id, 16,
                                               GetInfoBarType() == WARNING_TYPE
                                                   ? SkColorSetRGB(0xFF, 0x67, 0)
                                                   : gfx::kGoogleBlue500));
     }
   }
 #endif
 
   int icon_id = GetIconId();
   return icon_id == kNoIconID ? gfx::Image() :
       ResourceBundle::GetSharedInstance().GetNativeImageNamed(icon_id);
@@ skipping 75 matching lines @@
 MediaThrottleInfoBarDelegate*
     InfoBarDelegate::AsMediaThrottleInfoBarDelegate() {
   return nullptr;
 }
 #endif
 
 InfoBarDelegate::InfoBarDelegate() : nav_entry_id_(0) {
 }
 
 }  // namespace infobars