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

chrome/test/ppapi/ppapi_test.cc

Index: chrome/test/ppapi/ppapi_test.cc
diff --git a/chrome/test/ppapi/ppapi_test.cc b/chrome/test/ppapi/ppapi_test.cc
index 250c0bc535ca6235b0f13f32e9349f83cd1b56b6..8d8906e238c1911b9e45ff34b6cbcbb4f64156af 100644
--- a/chrome/test/ppapi/ppapi_test.cc
+++ b/chrome/test/ppapi/ppapi_test.cc
@@ -37,6 +37,7 @@
 #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;
@@ -143,6 +144,9 @@ void PPAPITestBase::SetUpCommandLine(base::CommandLine* command_line) {
 
   // Smooth scrolling confuses the scrollbar test.
   command_line->AppendSwitch(switches::kDisableSmoothScrolling);
+
+  // Enable touch events api.
+  command_line->AppendSwitch(switches::kTouchEvents);
 }
 
 void PPAPITestBase::SetUpOnMainThread() {