Fix print media page size by using the value we compute.

BUG=82472
TEST=NONE (in bug)


Review URL: http://codereview.chromium.org/8344016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@106160 0039d316-1c4b-4281-b951-d872f2087c98
PrintWebViewHelper::PrintPreviewContext::PrintPreviewContext()
    : frame_(NULL),
      total_page_count_(0),
      current_page_index_(0),
      generate_draft_pages_(true),
      print_ready_metafile_page_count_(0),
      error_(PREVIEW_ERROR_NONE),
      state_(UNINITIALIZED) {
}

PrintWebViewHelper::PrintPreviewContext::PrintPreviewContext()
    : frame_(NULL),
      total_page_count_(0),
      current_page_index_(0),
      generate_draft_pages_(true),
      print_ready_metafile_page_count_(0),
      error_(PREVIEW_ERROR_NONE),
      state_(UNINITIALIZED) {
}
