Add custom icon support to GlobalError. Show extension icon in permissions increase bubble.

chrome/browser/ui/global_error/global_error.cc

Index: chrome/browser/ui/global_error/global_error.cc
diff --git a/chrome/browser/ui/global_error/global_error.cc b/chrome/browser/ui/global_error/global_error.cc
index fce33ef384749b15f8e30ab461166dca579d443e..f6388459bfaeba677f64f5f1f16eba4b840ac34d 100644
--- a/chrome/browser/ui/global_error/global_error.cc
+++ b/chrome/browser/ui/global_error/global_error.cc
@@ -7,6 +7,7 @@
 #include "base/logging.h"
 #include "chrome/browser/ui/global_error/global_error_bubble_view_base.h"
 #include "grit/theme_resources.h"
+#include "ui/gfx/image/image.h"
 
 GlobalError::GlobalError()
     : has_shown_bubble_view_(false),
@@ -45,6 +46,10 @@ GlobalErrorBubbleViewBase* GlobalError::GetBubbleView() {
   return bubble_view_;
 }
 
+gfx::Image* GlobalError::GetBubbleViewCustomIcon() {
+  return NULL;
+}
+
 int GlobalError::GetBubbleViewIconResourceID() {
   // If you change this make sure to also change the menu icon and the wrench
   // icon color.