Reset the default value of touch event flag back to "Auto".

chrome/test/ppapi/ppapi_test.cc

 // Copyright (c) 2012 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 "chrome/test/ppapi/ppapi_test.h"
 
 #include <stdint.h>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
@@ skipping 19 matching lines @@
 #include "components/nacl/common/nacl_switches.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/ppapi_test_utils.h"
 #include "media/base/media_switches.h"
 #include "net/base/filename_util.h"
 #include "net/test/spawned_test_server/spawned_test_server.h"
 #include "net/test/test_data_directory.h"
 #include "ppapi/shared_impl/ppapi_switches.h"
+#include "ui/events/event_switches.h"
 #include "ui/gl/gl_switches.h"
 
 using content::RenderViewHost;
 using content::TestMessageHandler;
 
 namespace {
 
 void AddPrivateSwitches(base::CommandLine* command_line) {
   // For TestRequestOSFileHandle.
   command_line->AppendSwitch(switches::kUnlimitedStorage);
@@ skipping 86 matching lines @@
   InProcessBrowserTest::SetUp();
 }
 
 void PPAPITestBase::SetUpCommandLine(base::CommandLine* command_line) {
   // Some stuff is hung off of the testing interface which is not enabled
   // by default.
   command_line->AppendSwitch(switches::kEnablePepperTesting);
 
   // Smooth scrolling confuses the scrollbar test.
   command_line->AppendSwitch(switches::kDisableSmoothScrolling);
+
+  // Enable touche events api.

[raymes, 2016/11/30 02:14:41]

nit: touche->touch

[sunyunjia, 2016/11/30 02:41:53]

Done.

+  command_line->AppendSwitch(switches::kTouchEvents);

[raymes, 2016/11/30 02:14:41]

Hmm, how come this is needed?

[sunyunjia, 2016/11/30 02:41:53]

In the previous patch(https://codereview.chromium.org/2467913002), we prevent
the touch-actions in TouchEventManager based on the touch-events flag
https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/input/Tou....
In that patch, we set the default value of the flag as "enabled" so there's no
problem.

In this patch, we reset the default value to "auto" depending on whether there's
a touchscreen, which is false in the test, and the test fails because of that.
So we want to manually set it as "enabled" to pass the test.

 }
 
 void PPAPITestBase::SetUpOnMainThread() {
   // Always allow access to the PPAPI broker.
   HostContentSettingsMapFactory::GetForProfile(browser()->profile())
       ->SetDefaultContentSetting(CONTENT_SETTINGS_TYPE_PPAPI_BROKER,
                                  CONTENT_SETTING_ALLOW);
 }
 
 GURL PPAPITestBase::GetTestFileUrl(const std::string& test_case) {
@@ skipping 274 matching lines @@
     const std::string& base,
     const std::string& test_case) {
   return base::StringPrintf("%smode=nacl_newlib&testcase=%s", base.c_str(),
                             test_case.c_str());
 }
 
 void PPAPIBrokerInfoBarTest::SetUpOnMainThread() {
   // The default content setting for the PPAPI broker is ASK. We purposefully
   // don't call PPAPITestBase::SetUpOnMainThread() to keep it that way.
 }