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

third_party/WebKit/Source/wtf/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 assert(!is_ios)
 
 import("//testing/test.gni")
 import("//third_party/WebKit/Source/config.gni")
 
 visibility = [
   "//mojo/public/cpp/bindings/*",
   "//third_party/WebKit/*",
 ]
 
 config("wtf_config") {
   configs = [ "//third_party/WebKit/Source/platform/wtf:wtf_config" ]
 }
 
 component("wtf") {
   sources = [
     "ASCIICType.h",
     "AddressSanitizer.h",
     "Alignment.h",
     "Allocator.h",
-    "Assertions.cpp",
     "Assertions.h",
     "Atomics.h",
     "AutoReset.h",
     "BitVector.cpp",
     "BitVector.h",
     "BitwiseOperations.h",
     "BloomFilter.h",
     "ByteOrder.h",
     "ByteSwap.h",
     "CPU.h",
@@ skipping 289 matching lines @@
   ]
 
   deps = [
     ":wtf",
     "//base",
     "//base/test:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }