Add chrome-search: access from Instant overlay

chrome/browser/ui/webui/favicon_source.cc

Index: chrome/browser/ui/webui/favicon_source.cc
diff --git a/chrome/browser/ui/webui/favicon_source.cc b/chrome/browser/ui/webui/favicon_source.cc
index 9f90270e57225d96b26c1f902a2fb1cfa6f3398a..3c8658237e4703f4d7c00a289968a2930d120d9d 100644
--- a/chrome/browser/ui/webui/favicon_source.cc
+++ b/chrome/browser/ui/webui/favicon_source.cc
@@ -9,10 +9,12 @@
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/favicon/favicon_service_factory.h"
 #include "chrome/browser/history/top_sites.h"
+#include "chrome/browser/instant/instant_io_context.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/url_constants.h"
 #include "grit/locale_settings.h"
 #include "grit/ui_resources.h"
+#include "net/url_request/url_request.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
@@ -216,6 +218,12 @@ bool FaviconSource::ShouldReplaceExistingSource() const {
   return false;
 }
 
+bool FaviconSource::ShouldServiceRequest(const net::URLRequest* request) const {
+  if (request->url().SchemeIs(chrome::kChromeSearchScheme))
+    return InstantIOContext::ShouldServiceRequest(request);
+  return URLDataSource::ShouldServiceRequest(request);
+}
+
 bool FaviconSource::HandleMissingResource(const IconRequest& request) {
   // No additional checks to locate the favicon resource in the base
   // implementation.