windows: update gtest/gmock paths

The Windows build has rotted a bit with the gtest/gmock updates.
Update all of the paths to fix things up again.

Change-Id: Id67ce76abfd331c0543aa4bd1138e9cc13a18c75
Reviewed-on: https://chromium-review.googlesource.com/441584
Reviewed-by: Mark Mentovai <mark@chromium.org>

src/tools/windows/dump_syms/dump_syms_unittest.cc

@@ -32,8 +32,7 @@
 #include <string>
 #include <utility>
 
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
+#include "breakpad_googletest_includes.h"
 
 namespace tools {
 namespace windows {
@@ -201,4 +200,4 @@ TEST_F(DumpSymsRegressionTest, EnsureDumpedSymbolsMatch) {
 
 }  // namespace dump_syms
 }  // namespace windows
-}  // namespace tools
+}  // namespace tools