Revert of printing::Metafile: Simplify OS_MACOSX-specific code path

printing/pdf_metafile_cg_mac.cc

Index: printing/pdf_metafile_cg_mac.cc
diff --git a/printing/pdf_metafile_cg_mac.cc b/printing/pdf_metafile_cg_mac.cc
index 898e795010052ebe85a5d8bc7bfde2fb6024fe09..16744bfde6c702ab27c3e3fa91df1cde8bd6148f 100644
--- a/printing/pdf_metafile_cg_mac.cc
+++ b/printing/pdf_metafile_cg_mac.cc
@@ -157,24 +157,11 @@
   return true;
 }
 
-/* TODO(caryclark): The set up of PluginInstance::PrintPDFOutput may result in
-   rasterized output.  Even if that flow uses PdfMetafileCg::RenderPage,
-   the drawing of the PDF into the canvas may result in a rasterized output.
-   PDFMetafileSkia::RenderPage should be not implemented as shown and instead
-   should do something like the following CL in PluginInstance::PrintPDFOutput:
-   http://codereview.chromium.org/7200040/diff/1/webkit/plugins/ppapi/ppapi_plugin_instance.cc
-*/
-bool PdfMetafileCg::RenderPage(const std::vector<char>& src_buffer,
-                               unsigned int page_number,
+bool PdfMetafileCg::RenderPage(unsigned int page_number,
                                CGContextRef context,
                                const CGRect rect,
-                               const PdfMetafileCg::RenderPageParams& params) {
-  PdfMetafileCg metafile;
-  if (!metafile.InitFromData(src_buffer.data(), src_buffer.size())) {
-    LOG(ERROR) << "Unable to initialize PDF document from data";
-    return false;
-  }
-  CGPDFDocumentRef pdf_doc = metafile.GetPDFDocument();
+                               const MacRenderPageParams& params) const {
+  CGPDFDocumentRef pdf_doc = GetPDFDocument();
   if (!pdf_doc) {
     LOG(ERROR) << "Unable to create PDF document from data";
     return false;