Add default icon to app_host.exe, and use it in shortcuts during installation.

chrome/browser/shell_integration_win.cc

Index: chrome/browser/shell_integration_win.cc
diff --git a/chrome/browser/shell_integration_win.cc b/chrome/browser/shell_integration_win.cc
index 32790758ac80e8dca1611102a0d4ba660584e21b..18daed7a2bf032e21d7cd076ad34a6a6aaf56d6e 100644
--- a/chrome/browser/shell_integration_win.cc
+++ b/chrome/browser/shell_integration_win.cc
@@ -434,11 +434,8 @@ string16 ShellIntegration::GetChromiumIconPath() {
     return string16();
   }
 
-  string16 icon_path(app_path.value());
-  icon_path.push_back(',');
-  icon_path += base::IntToString16(
-      BrowserDistribution::GetDistribution()->GetIconIndex());
-  return icon_path;
+  return ShellUtil::GetResourceString(
+      app_path.value(), BrowserDistribution::GetDistribution()->GetIconIndex());
 }
 
 void ShellIntegration::MigrateChromiumShortcuts() {