Revert of Make cc/paint have concrete types

content/renderer/gpu/gpu_benchmarking_extension.cc

 // Copyright (c) 2012 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 "content/renderer/gpu/gpu_benchmarking_extension.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 457 matching lines @@
   const float kPageHeight = 792.0f;  // 11 inch
   const float kMarginTop = 29.0f;    // 0.40 inch
   const float kMarginLeft = 29.0f;   // 0.40 inch
   const int kContentWidth = 555;     // 7.71 inch
   const int kContentHeight = 735;    // 10.21 inch
   blink::WebPrintParams params(blink::WebSize(kContentWidth, kContentHeight));
   params.printerDPI = 300;
   int page_count = frame->printBegin(params);
   for (int i = 0; i < page_count; ++i) {
     SkCanvas* sk_canvas = doc->beginPage(kPageWidth, kPageHeight);
-    cc::PaintCanvas canvas(sk_canvas);
+    cc::PaintCanvasPassThrough canvas(sk_canvas);
     cc::PaintCanvasAutoRestore auto_restore(&canvas, true);
     canvas.translate(kMarginLeft, kMarginTop);
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
     float page_shrink = frame->getPrintPageShrink(i);
     DCHECK(page_shrink > 0);
     canvas.scale(page_shrink, page_shrink);
 #endif
 
     frame->printPage(i, &canvas);
@@ skipping 611 matching lines @@
           &gpu_driver_bug_workarounds))) {
     return;
   }
 
   v8::Local<v8::Value> result;
   if (gin::TryConvertToV8(args->isolate(), gpu_driver_bug_workarounds, &result))
     args->Return(result);
 }
 
 }  // namespace content