Snapshot of all changes to get jumbo in blink and content.

third_party/WebKit/Source/core/core.gni

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/jumbo.gni")
 import("//build/split_static_library.gni")
 import("//third_party/WebKit/Source/config.gni")
 
 blink_core_output_dir = "$root_gen_dir/blink/core"
@@ skipping 100 matching lines @@
     # Take everything else not handled above from the invoker.
     forward_variables_from(invoker,
                            "*",
                            [
                              "deps",
                              "public_deps",
                              "split_count",
                            ])
   }
 }
+
+template("blink_unit_test_source_set") {
+  jumbo_target(target_name) {
+    target_type = "source_set"
+    forward_variables_from(invoker, "*")
+  }
+}
+
 set_defaults("blink_core_sources") {
   # This sets the default list of configs when the blink_core_sources target
   # is defined. The default_compiler_configs comes from BUILDCONFIG.gn and
   # is the list normally applied to static libraries and source sets.
   configs = default_compiler_configs - core_config_remove + core_config_add
 
   # Compile each of the core sources targets with (core) precompiled header
   # support, for lower Windows build times.
   configs += [ "//third_party/WebKit/Source/core:blink_core_pch" ]
 }
+
+set_defaults("blink_unit_test_source_set") {
+  configs = default_compiler_configs
+}