Eliminate skia::PlatformCanvas - Step 1

webkit/plugins/ppapi/ppapi_plugin_instance.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 "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 1211 matching lines @@
     page_rect.origin.y = current_print_settings_.printable_area.point.y;
     page_rect.size.width = current_print_settings_.printable_area.size.width;
     page_rect.size.height = current_print_settings_.printable_area.size.height;
 
     ret = metafile->RenderPage(1, canvas, page_rect, true, false, true, true);
     CGContextRestoreGState(canvas);
   }
 #elif defined(OS_WIN)
   // On Windows, we now need to render the PDF to the DC that backs the
   // supplied canvas.
+  skia::PlatformCanvas* platform_canvas =
+      static_cast<skia::PlatformCanvas*>(canvas);
   skia::VectorPlatformDevice& device =
       static_cast<skia::VectorPlatformDevice&>(
-          canvas->getTopPlatformDevice());
+          platform_canvas->getTopPlatformDevice());
   HDC dc = device.getBitmapDC();
   gfx::Size size_in_pixels;
   size_in_pixels.set_width(
       printing::ConvertUnit(current_print_settings_.printable_area.size.width,
                             static_cast<int>(printing::kPointsPerInch),
                             current_print_settings_.dpi));
   size_in_pixels.set_height(
       printing::ConvertUnit(current_print_settings_.printable_area.size.height,
                             static_cast<int>(printing::kPointsPerInch),
                             current_print_settings_.dpi));
@@ skipping 68 matching lines @@
     canvas->drawBitmapRect(*bitmap, &src_rect, dest_rect);
 #endif  // defined(OS_MACOSX)
   return true;
 }
 
 #if defined(OS_WIN)
 bool PluginInstance::DrawJPEGToPlatformDC(
     const SkBitmap& bitmap,
     const gfx::Rect& printable_area,
     WebKit::WebCanvas* canvas) {
+  skia::PlatformCanvas* platform_canvas =
+      static_cast<skia::PlatformCanvas*>(canvas);
   skia::VectorPlatformDevice& device =
       static_cast<skia::VectorPlatformDevice&>(
-          canvas->getTopPlatformDevice());
+          platform_canvas->getTopPlatformDevice());
   HDC dc = device.getBitmapDC();
   // TODO(sanjeevr): This is a temporary hack. If we output a JPEG
   // to the EMF, the EnumEnhMetaFile call fails in the browser
   // process. The failure also happens if we output nothing here.
   // We need to investigate the reason for this failure and fix it.
   // In the meantime this temporary hack of drawing an empty
   // rectangle in the DC gets us by.
   Rectangle(dc, 0, 0, 0, 0);
 
   // Ideally we should add JPEG compression to the VectorPlatformDevice class
@@ skipping 134 matching lines @@
   return found->second;
 }
 
 bool PluginInstance::IsFullPagePlugin() const {
   WebFrame* frame = container()->element().document().frame();
   return frame->view()->mainFrame()->document().isPluginDocument();
 }
 
 }  // namespace ppapi
 }  // namespace webkit