This change implements a first pass in the effort to remove the dependency of PlatformDevice within Chrome.  The Skia library now provides multiple back-ends for the SkDevice class, so PlatformDevice's inheritance of SkDevice, and the assumption of instances of PlatformDevice limits the use of these new back-ends.

A new set of helper functions is provided for the PlatformDevice entry points.  Upon construction of a PlatformDevice, a pointer to the interface is cached in the parent SkDevice's SkMetaData.  The new helper functions forward calls to the interface cached in the metadata.

BUG=NONE
TEST=NONE
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=86625
Reverted:  http://src.chromium.org/viewvc/chrome?view=rev&revision=86625
Review URL: http://codereview.chromium.org/7019013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@86823 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/printing/pdf_metafile_skia.cc b/printing/pdf_metafile_skia.cc
index 80d49313..f76eb704 100644
--- a/printing/pdf_metafile_skia.cc
+++ b/printing/pdf_metafile_skia.cc
@@ -36,7 +36,7 @@
   return data_->pdf_stream_.write(src_buffer, src_buffer_size);
 }
 
-skia::PlatformDevice* PdfMetafileSkia::StartPageForVectorCanvas(
+SkDevice* PdfMetafileSkia::StartPageForVectorCanvas(
     const gfx::Size& page_size, const gfx::Rect& content_area,
     const float& scale_factor) {
   DCHECK(data_->current_page_.get() == NULL);