Split browser.lib to avoid hitting 4 GB limit

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 6c620cbfa428eea8a79e3a328adcf63e64371bbb..edb31bd7669794b3ee30490a7ef7c7f7e43a8007 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -55,9 +55,11 @@ if (is_win) {
 # Use a static library here because many test binaries depend on this but don't
 # require many files from it. This makes linking more efficient.
 split_static_library("browser") {
-  # Split into multiple static libraries on Windows official builds, where we
-  # run into a 2GB max size limit.
-  if (is_win && is_official_build) {
+  # Split into multiple static libraries on Windows builds. We have hit size
+  # on Windows official builds and on goma builds symbol_level = 2 is selected.
+  # Always splitting on Windows builds is simpler than trying to perfectly
+  # calculate the scenarios where it is required.
+  if (is_win) {
     split_count = 5
   } else {
     split_count = 1