Context menus should appear above the touch point if invoked by long press.

content/port/browser/render_view_host_delegate_view.h

Index: content/port/browser/render_view_host_delegate_view.h
diff --git a/content/port/browser/render_view_host_delegate_view.h b/content/port/browser/render_view_host_delegate_view.h
index 74d194fcb758e40814254e6ed31ceb6cb190a704..678a449c4f37561f0bedb4afdf437174980d37e2 100644
--- a/content/port/browser/render_view_host_delegate_view.h
+++ b/content/port/browser/render_view_host_delegate_view.h
@@ -9,6 +9,7 @@
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
+#include "content/public/common/context_menu_source_type.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 
 class SkBitmap;
@@ -32,7 +33,8 @@ class CONTENT_EXPORT RenderViewHostDelegateView {
  public:
   // A context menu should be shown, to be built using the context information
   // provided in the supplied params.
-  virtual void ShowContextMenu(const ContextMenuParams& params) {}
+  virtual void ShowContextMenu(const ContextMenuParams& params,
+                               const ContextMenuSourceType& type) {}

[jam, 2012/09/07 17:07:56]

ditto

 
   // Shows a popup menu with the specified items.
   // This method should call RenderViewHost::DidSelectPopupMenuItem[s]() or