[clang-tidy] Refactor: Move google clang-tidy checks to namespace clang::tidy::google

http://reviews.llvm.org/D7994

Patch by Richard Thomson!

llvm-svn: 231364
diff --git a/clang-tools-extra/unittests/clang-tidy/GoogleModuleTest.cpp b/clang-tools-extra/unittests/clang-tidy/GoogleModuleTest.cpp
index 4ddf8d9..806eecd 100644
--- a/clang-tools-extra/unittests/clang-tidy/GoogleModuleTest.cpp
+++ b/clang-tools-extra/unittests/clang-tidy/GoogleModuleTest.cpp
@@ -3,6 +3,8 @@
 #include "google/GlobalNamesInHeadersCheck.h"
 #include "gtest/gtest.h"
 
+using namespace clang::tidy::google;
+
 namespace clang {
 namespace tidy {
 namespace test {