Add a default icon for theme install infobar....

chrome/browser/extensions/theme_preview_infobar_delegate.cc

Index: chrome/browser/extensions/theme_preview_infobar_delegate.cc
===================================================================
--- chrome/browser/extensions/theme_preview_infobar_delegate.cc	(revision 22787)
+++ chrome/browser/extensions/theme_preview_infobar_delegate.cc	(working copy)
@@ -5,10 +5,12 @@
 #include "chrome/browser/extensions/theme_preview_infobar_delegate.h"
 
 #include "app/l10n_util.h"
+#include "app/resource_bundle.h"
 #include "base/string_util.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "grit/generated_resources.h"
+#include "grit/theme_resources.h"
 
 ThemePreviewInfobarDelegate::ThemePreviewInfobarDelegate(
     TabContents* tab_contents, const std::string& name)
@@ -28,7 +30,8 @@
 SkBitmap* ThemePreviewInfobarDelegate::GetIcon() const {
   // TODO(aa): Reply with the theme's icon, but this requires reading it
   // asynchronously from disk.
-  return NULL;
+  return ResourceBundle::GetSharedInstance().GetBitmapNamed(
+      IDR_INFOBAR_THEME);
 }
 
 ThemePreviewInfobarDelegate*