[Device Service] Move Gamepad Blink headers to be part of the Gamepad client library

third_party/WebKit/public/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.
 
 import("//build/buildflag_header.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 172 matching lines @@
     "platform/WebFileWriter.h",
     "platform/WebFileWriterClient.h",
     "platform/WebFlingAnimator.h",
     "platform/WebFloatPoint.h",
     "platform/WebFloatPoint3D.h",
     "platform/WebFloatRect.h",
     "platform/WebFloatSize.h",
     "platform/WebFocusType.h",
     "platform/WebFont.h",
     "platform/WebFontDescription.h",
-    "platform/WebGamepad.h",
     "platform/WebGamepadListener.h",
-    "platform/WebGamepads.h",
     "platform/WebGestureCurve.h",
     "platform/WebGestureCurveTarget.h",
     "platform/WebGestureDevice.h",
     "platform/WebGestureEvent.h",
     "platform/WebGraphicsContext3DProvider.h",
     "platform/WebHTTPBody.h",
     "platform/WebHTTPHeaderVisitor.h",
     "platform/WebHTTPLoadInfo.h",
     "platform/WebHistoryScrollRestorationType.h",
     "platform/WebIconSizesParser.h",
@@ skipping 597 matching lines @@
 source_set("shared_typemap_traits") {
   visibility = [ ":*" ]
   sources = [
     "web/ConsoleMessageStructTraits.cpp",
     "web/ConsoleMessageStructTraits.h",
   ]
   deps = [
     ":mojo_bindings_shared__generator",
   ]
 }