Add GetAppDefaultIcon() to AppDelegate

chrome/browser/ui/apps/chrome_app_delegate.cc

Index: chrome/browser/ui/apps/chrome_app_delegate.cc
diff --git a/chrome/browser/ui/apps/chrome_app_delegate.cc b/chrome/browser/ui/apps/chrome_app_delegate.cc
index 06eea7b26d9239c5475d1275cf237ee635a8854d..64dd03ed6f0a1d6de0c54095d4932b9e3838f8e4 100644
--- a/chrome/browser/ui/apps/chrome_app_delegate.cc
+++ b/chrome/browser/ui/apps/chrome_app_delegate.cc
@@ -23,6 +23,8 @@
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "extensions/common/constants.h"
+#include "grit/theme_resources.h"
+#include "ui/base/resource/resource_bundle.h"
 
 #if defined(USE_ASH)
 #include "ash/shelf/shelf_constants.h"
@@ -231,6 +233,11 @@ int ChromeAppDelegate::PreferredIconSize() {
 #endif
 }
 
+gfx::ImageSkia ChromeAppDelegate::GetAppDefaultIcon() {
+  return *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
+      IDR_APP_DEFAULT_ICON);
+}
+
 void ChromeAppDelegate::SetWebContentsBlocked(
     content::WebContents* web_contents,
     bool blocked) {