Revert "Rework default GN symbol handling for win goma builds."

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 60c00e638949ebd169e4fbd32654e20190a21dd9..ebd19490f2bd986b496bb9b5dcbf38f0bc84c421 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -1505,8 +1505,14 @@ config("default_optimization") {
 config("symbols") {
   if (is_win) {
     import("//build/toolchain/goma.gni")
-    cflags = [ "/Zi" ]  # Produce PDB file, no edit and continue.
-
+    if (use_goma) {
+      # Disable symbols during goma compilation because otherwise the redundant
+      # debug information (repeated in every .obj file) makes linker memory
+      # consumption and link times unsustainable (crbug.com/630074).
+      cflags = []
+    } else {
+      cflags = [ "/Zi" ]  # Produce PDB file, no edit and continue.
+    }
     if (is_win_fastlink && visual_studio_version != "2013") {
       # Tell VS 2015+ to create a PDB that references debug
       # information in .obj and .lib files instead of copying