Fixed image size problem with application icon in launcher

ash/launcher/app_list_button.cc

Index: ash/launcher/app_list_button.cc
diff --git a/ash/launcher/app_list_button.cc b/ash/launcher/app_list_button.cc
index 2da8aa09fbf5243a490f89b6e4ffb7e8d05ed253..8879a387cc1746d94a57cbc157de07e7540a6d30 100644
--- a/ash/launcher/app_list_button.cc
+++ b/ash/launcher/app_list_button.cc
@@ -47,10 +47,6 @@ AppListButton::AppListButton(views::ButtonListener* listener,
   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() {