Add a PGO tag for the PGO builds in chrome://version

chrome/browser/ui/webui/version_ui.cc

Index: chrome/browser/ui/webui/version_ui.cc
diff --git a/chrome/browser/ui/webui/version_ui.cc b/chrome/browser/ui/webui/version_ui.cc
index 2961ea8e2bf0455e4af98ab128064e753ac46fc5..6a58fcb7eb62ce7a486e150075e8bd1afa613f3d 100644
--- a/chrome/browser/ui/webui/version_ui.cc
+++ b/chrome/browser/ui/webui/version_ui.cc
@@ -138,9 +138,11 @@ WebUIDataSource* CreateVersionUIDataSource() {
 #if defined(__clang__)
   html_source->AddString("compiler", "clang");
 #elif defined(_MSC_VER) && _MSC_VER == 1900
+#if BUILDFLAG(PGO_BUILD)
+  html_source->AddString("compiler", "MSVC 2015 (PGO)");
+#else
   html_source->AddString("compiler", "MSVC 2015");
-#elif defined(_MSC_VER) && _MSC_VER == 1800
-  html_source->AddString("compiler", "MSVC 2013");
+#endif
 #elif defined(_MSC_VER)
 #error "Unsupported version of MSVC."
 #else