Reland: Move wtf_unittests to platform/wtf/.

third_party/WebKit/public/BUILD.gn

Index: third_party/WebKit/public/BUILD.gn
diff --git a/third_party/WebKit/public/BUILD.gn b/third_party/WebKit/public/BUILD.gn
index f57eabd0dd28c22f7b8e5a5b9905df4bcbbcbdd5..72a4ec7ccab841881e0290c75da05e91f36ae14b 100644
--- a/third_party/WebKit/public/BUILD.gn
+++ b/third_party/WebKit/public/BUILD.gn
@@ -40,9 +40,9 @@ group("all_blink") {
     "//third_party/WebKit/Source/modules",
     "//third_party/WebKit/Source/platform:blink_platform_unittests",
     "//third_party/WebKit/Source/platform/heap:blink_heap_unittests",
+    "//third_party/WebKit/Source/platform/wtf:wtf_unittests",
     "//third_party/WebKit/Source/web",
     "//third_party/WebKit/Source/web:webkit_unit_tests",
-    "//third_party/WebKit/Source/wtf:wtf_unittests",
   ]
 }