Disable tap suppression logic for 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 90d238904be3bfec3b7d11a8ddd3f598166ee691..5055a330d285e6dc2b8e0819cdeda5ee0de714fb 100644
--- a/android_webview/lib/main/aw_main_delegate.cc
+++ b/android_webview/lib/main/aw_main_delegate.cc
@@ -34,6 +34,7 @@
 #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 {
 
@@ -59,6 +60,12 @@ bool AwMainDelegate::BasicStartupComplete(int* exit_code) {
 
   BrowserViewRenderer::CalculateTileMemoryPolicy();
 
+  // WebView apps can override WebView#computeScroll to achieve custom
+  // scroll/fling. As a result, fling animations may not be ticked, potentially
+  // confusing the tap suppression controller. Simply disable it for WebView.
+  ui::GestureConfiguration::GetInstance()
+      ->set_fling_touchscreen_tap_suppression_enabled(false);
+
   base::CommandLine* cl = base::CommandLine::ForCurrentProcess();
   cl->AppendSwitch(cc::switches::kEnableBeginFrameScheduling);