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 f94d49882278a31fa284d475f7bd9dfc664198be..c7edbe49d59a8397aaf5bc763373c4209301423f 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 +61,12 @@ 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(switches::kUseIpcCommandBuffer);
   cl->AppendSwitch(cc::switches::kEnableBeginFrameScheduling);