Revert 260949 "Move gtest/gmock BUILD.gn files to main tree."

> Move gtest/gmock BUILD.gn files to main tree.
> 
> Also moves the "unused variable warning" to a config in the build directory so
> it can be shared with outher targets without duplication on the command line.
> 
> BUG=
> R=cjhopman@chromium.org
> 
> Review URL: https://codereview.chromium.org/219433005

TBR=brettw@chromium.org

Review URL: https://codereview.chromium.org/218493017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@260954 0039d316-1c4b-4281-b951-d872f2087c98

build/config/win/BUILD.gn

@@ -109,11 +109,3 @@ config("incremental_linking") {
 config("no_incremental_linking") {
   ldflags = [ "/INCREMENTAL:NO" ]
 }
-
-# Disable unused variable warning ----------------------------------------------
-
-# Sometimes third-party code wants to disable this warning under MSVC, so this
-# config makes it easy to do so.
-config("disable_unused_variable_warning") {
-  cflags = [ "/wd4800" ]
-}

testing/gmock/BUILD.gn → tools/gn/secondary/testing/gmock/BUILD.gn

@@ -38,11 +38,6 @@ static_library("gmock") {
     ":gmock_config",
     "//testing/gtest:gtest_config",
   ]
-  if (is_win) {
-    all_dependent_configs += [
-      "//build/config/win:disable_unused_variable_warning",
-    ]
-  }
 }
 
 static_library("gmock_main") {

testing/gtest/BUILD.gn → tools/gn/secondary/testing/gtest/BUILD.gn

@@ -14,6 +14,10 @@ config("gtest_config") {
   # Gtest headers need to be able to find themselves.
   include_dirs = [ "include" ]
 
+  if (is_win) {
+    cflags = [ "/wd4800" ]  # Unused variable warning.
+  }
+
   if (is_posix) {
     defines += [
       # gtest isn't able to figure out when RTTI is disabled for gcc
@@ -74,11 +78,6 @@ static_library("gtest") {
   include_dirs = [ "." ]
 
   all_dependent_configs = [ ":gtest_config" ]
-  if (is_win) {
-    all_dependent_configs += [
-      "//build/config/win:disable_unused_variable_warning",
-    ]
-  }
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]