Clean up windows printing workflow.

BUG=none
TEST=printing works after code change.

Review URL: http://codereview.chromium.org/6374004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71960 0039d316-1c4b-4281-b951-d872f2087c98
void PrintWebViewHelper::RenderPagesForPreview(WebFrame *frame) {
  ViewMsg_PrintPages_Params print_settings = *print_pages_params_;
  ViewHostMsg_DidPreviewDocument_Params print_params;
  CreatePreviewDocument(print_settings, frame, &print_params);
  Send(new ViewHostMsg_PagesReadyForPreview(routing_id(), print_params));
}

void PrintWebViewHelper::RenderPagesForPreview(WebFrame *frame) {
  ViewMsg_PrintPages_Params print_settings = *print_pages_params_;
  ViewHostMsg_DidPreviewDocument_Params print_params;
  CreatePreviewDocument(print_settings, frame, &print_params);
  Send(new ViewHostMsg_PagesReadyForPreview(routing_id(), print_params));
}
