Mac: Prevent mouse events reaching subviews while a window has an attached Sheet

chrome/browser/ui/cocoa/fast_resize_view.mm

Index: chrome/browser/ui/cocoa/fast_resize_view.mm
diff --git a/chrome/browser/ui/cocoa/fast_resize_view.mm b/chrome/browser/ui/cocoa/fast_resize_view.mm
index b5bfb1eabe4908c8c91f0841c98e448e8f0a4b8f..82c0b7228948ba36cde11eeef4c6fc4e66babd4e 100644
--- a/chrome/browser/ui/cocoa/fast_resize_view.mm
+++ b/chrome/browser/ui/cocoa/fast_resize_view.mm
@@ -27,5 +27,14 @@
   return YES;
 }
 
+// Override -[NSView hitTest:] to prevent mouse events reaching subviews while
+// the window is displaying a modal sheet. Without this, context menus can be
+// shown on a right-click and trigger all kinds of things (e.g. Print).
+- (NSView*)hitTest:(NSPoint)aPoint {
+  if ([[self window] attachedSheet])
+    return self;
+  return [super hitTest:aPoint];
+}
+
 @end