Revert "Add precompiled headers to GN build for large targets."

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 754fd1e85b4452db9826f6a372f3d0f2c90a2682..735c8daea8f647ef0b6fd0d347bc209433fa0ea0 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -84,8 +84,6 @@ source_set("test_support") {
     "logging/win/test_log_collector.h",
   ]
 
-  configs += [ "//build/config:precompiled_headers" ]
-
   # New deps should go in the non-iOS section below.
   public_deps = [
     "//content/test:test_support",
@@ -230,7 +228,6 @@ if (!is_android) {
                     ".",
                     "//chrome")
 
-    configs += [ "//build/config:precompiled_headers" ]
     defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
     ldflags = []
 
@@ -550,8 +547,6 @@ if (!is_android) {
             ".",
             "//chrome")
 
-    configs += [ "//build/config:precompiled_headers" ]
-
     deps = [
       ":browser_tests_js_webui",
       ":sync_integration_test_support",
@@ -1159,7 +1154,6 @@ if (!is_android) {
                     ".",
                     "//chrome")
 
-    configs += [ "//build/config:precompiled_headers" ]
     defines = []
 
     deps = [