Use ui::GestureConfiguration to disable tap suppression in Android WebView

android_webview/lib/main/aw_main_delegate.cc

Index: android_webview/lib/main/aw_main_delegate.cc
diff --git a/android_webview/lib/main/aw_main_delegate.cc b/android_webview/lib/main/aw_main_delegate.cc
index f94d49882278a31fa284d475f7bd9dfc664198be..608718b5481a5359f74272810df2b4308c155338 100644
--- a/android_webview/lib/main/aw_main_delegate.cc
+++ b/android_webview/lib/main/aw_main_delegate.cc
@@ -35,6 +35,7 @@
 #include "gpu/command_buffer/client/gl_in_process_context.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "media/base/media_switches.h"
+#include "ui/events/gesture_detection/gesture_configuration.h"
 
 namespace android_webview {
 
@@ -60,6 +61,9 @@ bool AwMainDelegate::BasicStartupComplete(int* exit_code) {
 
   BrowserViewRenderer::CalculateTileMemoryPolicy();
 
+  ui::GestureConfiguration::GetInstance()
+      ->set_fling_touchscreen_tap_suppression_enabled(false);

[jdduke (slow), 2015/07/31 23:04:28]

This might be worth a comment, something about tap suppression interacting
poorly when the embedder prevents fling updates or something like that.

[hush (inactive), 2015/07/31 23:13:33]

Done.

+
   base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
   cl->AppendSwitch(switches::kUseIpcCommandBuffer);
   cl->AppendSwitch(cc::switches::kEnableBeginFrameScheduling);