[poc] curve-filter

third_party/WebKit/Source/core/input/EventHandler.cpp

Index: third_party/WebKit/Source/core/input/EventHandler.cpp
diff --git a/third_party/WebKit/Source/core/input/EventHandler.cpp b/third_party/WebKit/Source/core/input/EventHandler.cpp
index 47861ee82accc725137fb84ebbac9b5d1eb3bf63..f83edc7a4606cc554d29e34f8cf26c88668529f7 100644
--- a/third_party/WebKit/Source/core/input/EventHandler.cpp
+++ b/third_party/WebKit/Source/core/input/EventHandler.cpp
@@ -91,6 +91,7 @@
 #include "platform/TraceEvent.h"
 #include "platform/WindowsKeyboardCodes.h"
 #include "platform/geometry/FloatPoint.h"
+#include "platform/graphics/GraphicsScreen.h"
 #include "platform/graphics/Image.h"
 #include "platform/heap/Handle.h"
 #include "platform/scroll/ScrollAnimatorBase.h"
@@ -3449,8 +3450,11 @@ bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event, DragIni
     // Once we're past the hysteresis point, we don't want to treat this gesture as a click
     invalidateClick();
 
-    if (!tryStartDrag(event)) {
-        // Something failed to start the drag, clean up.
+    uintptr_t previousId = setCurrentScreenId(Page::screenId(m_frame->page()));
+    bool dragStarted = tryStartDrag(event);
+    setCurrentScreenId(previousId);
+
+    if (!dragStarted) { // Something failed to start the drag, clean up.
         clearDragDataTransfer();
         dragState().m_dragSrc = nullptr;
     }