Mac: Share kScrollbarPixelsPerCocoaTick between ui:: and blink:: events

ui/events/test/cocoa_test_event_utils.h

Index: ui/events/test/cocoa_test_event_utils.h
diff --git a/ui/events/test/cocoa_test_event_utils.h b/ui/events/test/cocoa_test_event_utils.h
index 0b9992c2ab84d9f433bd2ffe10c99acf4e7c1582..5e138878f7de54ce3bf64e6b6a499f5c0314408b 100644
--- a/ui/events/test/cocoa_test_event_utils.h
+++ b/ui/events/test/cocoa_test_event_utils.h
@@ -15,6 +15,15 @@
 
 namespace cocoa_test_event_utils {
 
+// Converts |window_point| in |window| coordinates (origin at bottom left of
+// window frame) to a point in global display coordinates for a CGEvent (origin
+// at top left of primary screen).
+CGPoint ScreenPointFromWindow(NSPoint window_point, NSWindow* window);
+
+// Converts |event| to an NSEvent with a timestamp from ui::EventTimeForNow(),
+// and attaches |window| to it.
+NSEvent* AttachWindowToCGEvent(CGEventRef event, NSWindow* window);
+
 // Create synthetic mouse events for testing. Currently these are very
 // basic, flesh out as needed.  Points are all in window coordinates;
 // where the window is not specified, coordinate system is undefined
@@ -41,6 +50,16 @@ std::pair<NSEvent*, NSEvent*> MouseClickInView(NSView* view,
 std::pair<NSEvent*, NSEvent*> RightMouseClickInView(NSView* view,
                                                     NSUInteger clickCount);
 
+// Creates a test scroll event. Currently only events for a "real" mouse wheel
+// are supported (-hasPreciseScrollingDeltas is NO).  If |window| is nil,
+// |location| is assumed to be AppKit screen coordinates (origin in bottom left
+// of primary screen).
+// TODO(tapted): Add event phase arguments to support trackpad scrolls also.
+NSEvent* TestScrollEvent(NSPoint location,
+                         NSWindow* window,
+                         CGFloat delta_x,
+                         CGFloat delta_y);
+
 // Returns a key event with the given character.
 NSEvent* KeyEventWithCharacter(unichar c);