Move more of webcore_remaining into GN build files.

third_party/WebKit/Source/core/fileapi/BUILD.gn

Index: third_party/WebKit/Source/core/fileapi/BUILD.gn
diff --git a/third_party/WebKit/Source/core/fileapi/BUILD.gn b/third_party/WebKit/Source/core/fileapi/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..da7c491ca9022fc6fd5cd7de5a5594aaf884cb44
--- /dev/null
+++ b/third_party/WebKit/Source/core/fileapi/BUILD.gn
@@ -0,0 +1,33 @@
+# Copyright 2016 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.
+
+import("//third_party/WebKit/Source/core/core.gni")
+
+blink_core_sources("fileapi") {
+  sources = [
+    "Blob.cpp",
+    "Blob.h",
+    "BlobCallback.h",
+    "File.cpp",
+    "File.h",
+    "FileError.cpp",
+    "FileError.h",
+    "FileList.cpp",
+    "FileList.h",
+    "FileReader.cpp",
+    "FileReader.h",
+    "FileReaderLoader.cpp",
+    "FileReaderLoader.h",
+    "FileReaderLoaderClient.h",
+    "FileReaderSync.cpp",
+    "FileReaderSync.h",
+    "URLFileAPI.cpp",
+    "URLFileAPI.h",
+  ]
+
+  configs += [
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
+}