Move files in wtf/ to platform/wtf/ (Part 7).

third_party/WebKit/Source/platform/wtf/BUILD.gn

Index: third_party/WebKit/Source/platform/wtf/BUILD.gn
diff --git a/third_party/WebKit/Source/platform/wtf/BUILD.gn b/third_party/WebKit/Source/platform/wtf/BUILD.gn
index 10ef3960d631c7c95baa6e3fa1f8f1589c0ebb94..0aaac6d5626c158a8fe940c67e5e09ab5b14a63e 100644
--- a/third_party/WebKit/Source/platform/wtf/BUILD.gn
+++ b/third_party/WebKit/Source/platform/wtf/BUILD.gn
@@ -64,6 +64,7 @@ source_set("platform_wtf") {
     "AddressSanitizer.h",
     "Alignment.h",
     "Allocator.h",
+    "Assertions.cpp",
     "Assertions.h",
     "Atomics.h",
     "AutoReset.h",
@@ -81,21 +82,38 @@ source_set("platform_wtf") {
     "DynamicAnnotations.cpp",
     "DynamicAnnotations.h",
     "Forward.h",
+    "Functional.h",
     "GetPtr.h",
+    "HashTableDeletedValueType.h",
+    "InstanceCounter.h",
     "LeakAnnotations.h",
+    "Locker.h",
     "NonCopyingSort.h",
     "Noncopyable.h",
     "NotFound.h",
     "Optional.h",
+    "PassRefPtr.h",
+    "PtrUtil.h",
+    "RefCounted.h",
+    "RefPtr.h",
     "SizeAssertions.h",
     "SpinLock.h",
+    "StackUtil.h",
     "StaticConstructors.h",
+    "StdLibExtras.h",
     "StringExtras.h",
+    "ThreadRestrictionVerifier.h",
+    "ThreadSafeRefCounted.h",
+    "ThreadSpecific.h",
+    "Threading.h",
+    "ThreadingPrimitives.h",
     "Time.h",
+    "TreeNode.h",
     "TriState.h",
     "TypeTraits.h",
     "WTF.h",
     "WTFExport.h",
+    "WeakPtr.h",
     "allocator/PartitionAllocator.cpp",
     "allocator/PartitionAllocator.h",
     "allocator/Partitions.cpp",