[Print Preview]: Added code to support pdf fit to page functionality.

BUG=85132
TEST=none


Review URL: https://chromiumcodereview.appspot.com/10083060

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@137498 0039d316-1c4b-4281-b951-d872f2087c98
TabContentsWrapper* PrintPreviewMessageHandler::GetPrintPreviewTab() {
  PrintPreviewTabController* tab_controller =
      PrintPreviewTabController::GetInstance();
  if (!tab_controller)
    return NULL;

  return tab_controller->GetPrintPreviewForTab(tab_contents_wrapper());
}

TabContentsWrapper* PrintPreviewMessageHandler::GetPrintPreviewTab() {
  PrintPreviewTabController* tab_controller =
      PrintPreviewTabController::GetInstance();
  if (!tab_controller)
    return NULL;

  return tab_controller->GetPrintPreviewForTab(tab_contents_wrapper());
}
