Break apart WebGestureEvent from WebInputEvent.

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/WebFocusType.h",
     "platform/WebFont.h",
     "platform/WebFontDescription.h",
     "platform/WebFrameScheduler.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",
     "platform/WebImage.h",
     "platform/WebImageGenerator.h",
     "platform/WebImageLayer.h",
     "platform/WebInbandTextTrack.h",
@@ skipping 279 matching lines @@
     "web/WebFrameWidget.h",
     "web/WebHeap.h",
     "web/WebHelperPlugin.h",
     "web/WebHistoryCommitType.h",
     "web/WebHistoryItem.h",
     "web/WebHitTestResult.h",
     "web/WebIconURL.h",
     "web/WebImageCache.h",
     "web/WebImageDecoder.h",
     "web/WebInputElement.h",
-    "web/WebInputEvent.h",
     "web/WebInputMethodController.h",
     "web/WebKit.h",
     "web/WebLabelElement.h",
     "web/WebLeakDetector.h",
     "web/WebLocalFrame.h",
     "web/WebMeaningfulLayout.h",
     "web/WebMediaDeviceChangeObserver.h",
     "web/WebMediaDevicesRequest.h",
     "web/WebMediaPlayerAction.h",
     "web/WebMediaStreamRegistry.h",
@@ skipping 258 matching lines @@
 # relegated to a separate target to avoid duplication between the variants.
 source_set("shared_typemap_traits") {
   visibility = [ ":*" ]
   sources = [
     "web/WindowFeaturesStructTraits.cpp",
   ]
   deps = [
     ":new_wrapper_types_mojo_bindings_shared__generator",
   ]
 }