Relanding this with fixes to the mac dbg builder

chrome/renderer/chrome_ppb_pdf_impl.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/chrome_ppb_pdf_impl.h"
 
 #include "base/metrics/histogram.h"
 #include "base/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/common/render_messages.h"
@@ skipping 160 matching lines @@
   if (!image_data->Init(
           webkit::ppapi::PPB_ImageData_Impl::GetNativeImageDataFormat(),
           res_bitmap->width(), res_bitmap->height(), false)) {
     return 0;
   }
 
   webkit::ppapi::ImageDataAutoMapper mapper(image_data);
   if (!mapper.is_valid())
     return 0;
 
-  skia::PlatformCanvas* canvas = image_data->mapped_canvas();
+  skia::PlatformCanvas* canvas = image_data->GetPlatformCanvas();
   // Note: Do not skBitmap::copyTo the canvas bitmap directly because it will
   // ignore the allocated pixels in shared memory and re-allocate a new buffer.
   canvas->writePixels(*res_bitmap, 0, 0);
 
   return image_data->GetReference();
 }
 
 PP_Resource GetFontFileWithFallback(
     PP_Instance instance_id,
     const PP_FontDescription_Dev* description,
@@ skipping 182 matching lines @@
   &Print
 };
 
 // static
 const PPB_PDF* PPB_PDF_Impl::GetInterface() {
   return &ppb_pdf;
 }
 
 }  // namespace chrome