Send wheel gestures from event sender.

content/shell/renderer/layout_test/layout_test_render_process_observer.cc

 // Copyright (c) 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.
 
 #include "content/shell/renderer/layout_test/layout_test_render_process_observer.h"
 
 #include "base/command_line.h"
+#include "components/test_runner/event_sender.h"
+#include "components/test_runner/test_interfaces.h"
 #include "components/test_runner/web_test_interfaces.h"
+#include "content/common/input/input_event_utils.h"
 #include "content/public/common/content_client.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
 #include "content/public/test/layouttest_support.h"
 #include "content/shell/common/layout_test/layout_test_switches.h"
 #include "content/shell/common/shell_messages.h"
 #include "content/shell/renderer/layout_test/blink_test_runner.h"
 #include "third_party/WebKit/public/web/WebKit.h"
 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 #include "third_party/WebKit/public/web/WebView.h"
@@ skipping 45 matching lines @@
   std::string flags("--expose-gc");
   v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.size()));
 
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kStableReleaseMode)) {
     WebRuntimeFeatures::enableTestOnlyFeatures(true);
   }
 
   test_interfaces_.reset(new test_runner::WebTestInterfaces);
   test_interfaces_->ResetAll();
+  test_interfaces_->SetSendWheelGestures(UseGestureBasedWheelScrolling());
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableFontAntialiasing)) {
     blink::setFontAntialiasingEnabledForTest(true);
   }
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kAlwaysUseComplexText)) {
     blink::setAlwaysUseComplexTextForTest(true);
   }
 }
 
@@ skipping 11 matching lines @@
 
   return handled;
 }
 
 void LayoutTestRenderProcessObserver::OnSetWebKitSourceDir(
     const base::FilePath& webkit_source_dir) {
   webkit_source_dir_ = webkit_source_dir;
 }
 
 }  // namespace content