Incremental linking setup for GN Windows build.

build/config/win/BUILD.gn

Index: build/config/win/BUILD.gn
diff --git a/build/config/win/BUILD.gn b/build/config/win/BUILD.gn
index 3e98c1a871ee9bcd2ac39184127600262cbf391d..4ca22f7fa414b29f4aab6d13290a7c40dc3ba4c9 100644
--- a/build/config/win/BUILD.gn
+++ b/build/config/win/BUILD.gn
@@ -106,11 +106,42 @@ config("windowed") {
 
 # Incremental linking ----------------------------------------------------------
 
+incremental_linking_on_switch = [ "/INCREMENTAL" ]
+incremental_linking_off_switch = [ "/INCREMENTAL:NO" ]
+
+# Applies incremental linking or not depending on the current configuration.
+config("default_incremental_linking") {
+  if (is_debug) {
+    ldflags = incremental_linking_on_switch
+  } else {
+    ldflags = incremental_linking_off_switch
+  }
+}
+
+# Explicitly on or off incremental linking
 config("incremental_linking") {
-  ldflags = [ "/INCREMENTAL" ]
+  ldflags = incremental_linking_on_switch
 }
 config("no_incremental_linking") {
-  ldflags = [ "/INCREMENTAL:NO" ]
+  ldflags = incremental_linking_off_switch
+}
+
+# Some large modules can't handle incremental linking in some situations. This
+# config should be applied to large modules to turn off incremental linking
+# when it won't work.
+config("default_large_module_incremental_linking") {
+  if (!is_debug) {
+    # Default is always off in release build.
+    ldflags = incremental_linking_off_switch
+  } else if ((symbol_level == 0 || symbol_level == 1) &&
+             (current_cpu == "x86" || !is_component_build)) {
+    # When full symbols are on, don't do incremental linking for large modules
+    # on 32-bit or in non-component mode as the toolchain fails due to the size
+    # of the .ilk files.
+    ldflags = incremental_linking_off_switch
+  } else {
+    ldflags = incremental_linking_on_switch
+  }
 }
 
 # Character set ----------------------------------------------------------------