Add skia::RefPtr class to wrap ref counted classes from Skia.

chrome/renderer/print_web_view_helper_linux.cc

Index: chrome/renderer/print_web_view_helper_linux.cc
diff --git a/chrome/renderer/print_web_view_helper_linux.cc b/chrome/renderer/print_web_view_helper_linux.cc
index f1ec86550ee3cea6c5cb5569de31050bae54bb05..5235cc5fddea80e0c658c04dfd4a6bc7868daa26 100644
--- a/chrome/renderer/print_web_view_helper_linux.cc
+++ b/chrome/renderer/print_web_view_helper_linux.cc
@@ -15,8 +15,8 @@
 #include "printing/metafile_skia_wrapper.h"
 #include "printing/page_size_margins.h"
 #include "skia/ext/platform_device.h"
+#include "skia/ext/refptr.h"
 #include "skia/ext/vector_canvas.h"
-#include "third_party/skia/include/core/SkRefCnt.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 
 #if !defined(OS_CHROMEOS)
@@ -187,15 +187,14 @@ void PrintWebViewHelper::PrintPageInternal(
   gfx::Rect canvas_area =
       params.params.display_header_footer ? gfx::Rect(page_size) : content_area;
 
-  SkDevice* device = metafile->StartPageForVectorCanvas(page_size, canvas_area,
-                                                        scale_factor);
+  skia::RefPtr<SkDevice> device = metafile->StartPageForVectorCanvas(
+      page_size, canvas_area, scale_factor);
   if (!device)
     return;
 
   // The printPage method take a reference to the canvas we pass down, so it
   // can't be a stack object.
-  SkRefPtr<skia::VectorCanvas> canvas = new skia::VectorCanvas(device);
-  canvas->unref();  // SkRefPtr and new both took a reference.
+  skia::RefPtr<skia::VectorCanvas> canvas = new skia::VectorCanvas(device);
   printing::MetafileSkiaWrapper::SetMetafileOnCanvas(*canvas, metafile);
   skia::SetIsDraftMode(*canvas, is_print_ready_metafile_sent_);