Fixed image size problem with application icon in launcher

ash/launcher/app_list_button.cc

 // Copyright (c) 2012 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 "ash/launcher/app_list_button.h"
 
 #include <vector>
 
 #include "ash/launcher/launcher_button_host.h"
 #include "ash/launcher/launcher_types.h"
@@ skipping 29 matching lines @@
       views::CustomButton::STATE_HOVERED,
       rb.GetImageNamed(IDR_AURA_LAUNCHER_ICON_APPLIST_HOT).
           ToImageSkia());
   SetImage(
       views::CustomButton::STATE_PRESSED,
       rb.GetImageNamed(IDR_AURA_LAUNCHER_ICON_APPLIST_PUSHED).
           ToImageSkia());
   SetAccessibleName(l10n_util::GetStringUTF16(IDS_AURA_APP_LIST_TITLE));
   SetSize(gfx::Size(kLauncherPreferredSize, kLauncherPreferredSize));
   SetImageAlignment(ImageButton::ALIGN_CENTER, ImageButton::ALIGN_TOP);
-  set_border(views::Border::CreateEmptyBorder(kBorderSize,
-                                              kBorderSize,
-                                              kBorderSize,
-                                              kBorderSize));
 }
 
 AppListButton::~AppListButton() {
 }
 
 void AppListButton::StartLoadingAnimation() {
   layer()->GetAnimator()->StopAnimating();
 
   scoped_ptr<ui::LayerAnimationSequence> opacity_sequence(
       new ui::LayerAnimationSequence());
@@ skipping 65 matching lines @@
   host_->MouseExitedButton(this);
 }
 
 void AppListButton::GetAccessibleState(ui::AccessibleViewState* state) {
   state->role = ui::AccessibilityTypes::ROLE_PUSHBUTTON;
   state->name = host_->GetAccessibleName(this);
 }
 
 }  // namespace internal
 }  // namespace ash