Make Metafile::StartPageForVectorCanvas take the page number as an argument.

This will let us add pages to a metafile out of order for print preview.
Also, make PdfMetafileSkia::GetMetafileForCurrentPage use draft mode, now that it's available.

BUG=NONE
TEST=NONE


Review URL: http://codereview.chromium.org/7481019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93763 0039d316-1c4b-4281-b951-d872f2087c98
12 files changed