Update googletest to top of tree

This eliminates a CMake warning. The old googletest set a minimum cmake
version that will soon lose support.

Change-Id: If12b920f1bbf1ddc7126baa8722a7f85848d1be7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/233354
Auto-Submit: David Neto <dneto@google.com>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: David Neto <dneto@google.com>
diff --git a/DEPS b/DEPS
index d3b1951..4f5814b 100644
--- a/DEPS
+++ b/DEPS
@@ -230,7 +230,7 @@
     'condition': 'dawn_standalone',
   },
   'third_party/googletest': {
-    'url': '{chromium_git}/external/github.com/google/googletest@7a7231c442484be389fdf01594310349ca0e42a8',
+    'url': '{chromium_git}/external/github.com/google/googletest@52204f78f94d7512df1f0f3bea1d47437a2c3a58',
     'condition': 'dawn_standalone',
   },
   # This is a dependency of //testing
diff --git a/third_party/googletest b/third_party/googletest
index 7a7231c..52204f7 160000
--- a/third_party/googletest
+++ b/third_party/googletest
@@ -1 +1 @@
-Subproject commit 7a7231c442484be389fdf01594310349ca0e42a8
+Subproject commit 52204f78f94d7512df1f0f3bea1d47437a2c3a58