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

printing/pdf_metafile_skia.cc

Index: printing/pdf_metafile_skia.cc
diff --git a/printing/pdf_metafile_skia.cc b/printing/pdf_metafile_skia.cc
index 54c1cf3568a074c0266841b46afa8ac18e219407..dd9149483fad62f8ab47a18d59c8b46c9ec9ac8f 100644
--- a/printing/pdf_metafile_skia.cc
+++ b/printing/pdf_metafile_skia.cc
@@ -24,6 +24,14 @@
 #include "ui/gfx/geometry/safe_integer_conversions.h"
 #include "ui/gfx/skia_util.h"
 
+#if defined(OS_MACOSX)
+#include "printing/pdf_metafile_cg_mac.h"
+#endif
+
+#if defined(OS_POSIX)
+#include "base/file_descriptor_posix.h"
+#endif
+
 namespace {
 
 bool WriteAssetToBuffer(const SkStreamAsset* asset,
@@ -96,6 +104,10 @@
   float scale_factor_;
   SkSize size_;
   SkiaDocumentType type_;
+
+#if defined(OS_MACOSX)
+  PdfMetafileCg pdf_cg_;
+#endif
 };
 
 PdfMetafileSkia::~PdfMetafileSkia() {}
@@ -242,6 +254,30 @@
 bool PdfMetafileSkia::SafePlayback(skia::NativeDrawingContext hdc) const {
   NOTREACHED();
   return false;
+}
+
+#elif defined(OS_MACOSX)
+/* 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 PdfMetafileSkia::RenderPage(unsigned int page_number,
+                                 CGContextRef context,
+                                 const CGRect rect,
+                                 const MacRenderPageParams& params) const {
+  DCHECK_GT(GetDataSize(), 0U);
+  if (data_->pdf_cg_.GetDataSize() == 0) {
+    if (GetDataSize() == 0)
+      return false;
+    size_t length = data_->pdf_data_->getLength();
+    std::vector<uint8_t> buffer(length);
+    (void)WriteAssetToBuffer(data_->pdf_data_.get(), &buffer[0], length);
+    data_->pdf_cg_.InitFromData(&buffer[0], length);
+  }
+  return data_->pdf_cg_.RenderPage(page_number, context, rect, params);
 }
 #endif