Move more sources from modules.gypi to subdirectories.

third_party/WebKit/Source/modules/bluetooth/BUILD.gn

Index: third_party/WebKit/Source/modules/bluetooth/BUILD.gn
diff --git a/third_party/WebKit/Source/modules/bluetooth/BUILD.gn b/third_party/WebKit/Source/modules/bluetooth/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..f2a98e4c111e819d66b2aea10544f1c17f101448
--- /dev/null
+++ b/third_party/WebKit/Source/modules/bluetooth/BUILD.gn
@@ -0,0 +1,30 @@
+# 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/modules/modules.gni")
+
+blink_modules_sources("bluetooth") {
+  sources = [
+    "Bluetooth.cpp",
+    "Bluetooth.h",
+    "BluetoothCharacteristicProperties.cpp",
+    "BluetoothCharacteristicProperties.h",
+    "BluetoothDevice.cpp",
+    "BluetoothDevice.h",
+    "BluetoothError.cpp",
+    "BluetoothError.h",
+    "BluetoothRemoteGATTCharacteristic.cpp",
+    "BluetoothRemoteGATTCharacteristic.h",
+    "BluetoothRemoteGATTServer.cpp",
+    "BluetoothRemoteGATTServer.h",
+    "BluetoothRemoteGATTService.cpp",
+    "BluetoothRemoteGATTService.h",
+    "BluetoothSupplement.cpp",
+    "BluetoothSupplement.h",
+    "BluetoothUUID.cpp",
+    "BluetoothUUID.h",
+    "NavigatorBluetooth.cpp",
+    "NavigatorBluetooth.h",
+  ]
+}