Don't write image markup to the clipboard when copying images on OS X.

Don't write image markup to the clipboard when copying images on OS X.

If image markup is present on the clipboard, Mail.app will always prefer it over the actual image even if we declare the image types before the HTML type in -[NSPasteboard types]. With this change, we also match the behavior of other Mac browser when invoking the "Copy Image" action.

BUG=33016
TEST=Manual test with 'copy image' context menu item and then pasting it into a Mail.app draft.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=88569

[Nico, 2011-06-09 16:11:38]

LGTM

http://codereview.chromium.org/7044074/diff/1/webkit/glue/webclipboard_impl.cc
File webkit/glue/webclipboard_impl.cc (right):

http://codereview.chromium.org/7044074/diff/1/webkit/glue/webclipboard_impl.c...
webkit/glue/webclipboard_impl.cc:190: // the image markup over attaching the
actual image.
nit: Maybe add "See http://crbug.com/33016"