Moved AlphaBlend rasterization to renderer process like it was before 152681.

chrome/renderer/print_web_view_helper_win.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 "chrome/renderer/print_web_view_helper.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/process_util.h"
@@ skipping 20 matching lines @@
 using printing::kPointsPerInch;
 using printing::Metafile;
 using WebKit::WebFrame;
 
 void PrintWebViewHelper::PrintPageInternal(
     const PrintMsg_PrintPage_Params& params,
     const gfx::Size& canvas_size,
     WebFrame* frame) {
   // Generate a memory-based metafile. It will use the current screen's DPI.
   // Each metafile contains a single page.
-  scoped_ptr<Metafile> metafile(new printing::NativeMetafile);
+  scoped_ptr<printing::NativeMetafile> metafile(new printing::NativeMetafile);
   metafile->Init();
   DCHECK(metafile->context());
   skia::InitializeDC(metafile->context());
 
   int page_number = params.page_number;
 
   // Calculate the dpi adjustment.
   // Browser will render context using desired_dpi, so we need to calculate
   // adjustment factor to play content on the printer DC later during the
   // actual printing.
   double actual_shrink = static_cast<float>(params.params.desired_dpi /
                                             params.params.dpi);
   gfx::Size page_size_in_dpi;
   gfx::Rect content_area_in_dpi;
 
   // Render page for printing.
   RenderPage(params.params, page_number, frame, false, metafile.get(),
              &actual_shrink, &page_size_in_dpi, &content_area_in_dpi);
 
   // Close the device context to retrieve the compiled metafile.
   if (!metafile->FinishDocument())
     NOTREACHED();
 
+  if (!params.params.supports_alpha_blend && metafile->IsAlphaBlendUsed()) {
+    scoped_ptr<printing::NativeMetafile> raster_metafile(
+        metafile->RasterizeAlphaBlend());
+    if (raster_metafile.get())
+      metafile.swap(raster_metafile);
+  }
+
   // Get the size of the compiled metafile.
   uint32 buf_size = metafile->GetDataSize();
   DCHECK_GT(buf_size, 128u);
 
   PrintHostMsg_DidPrintPage_Params page_params;
   page_params.data_size = buf_size;
   page_params.metafile_data_handle = NULL;
   page_params.page_number = page_number;
   page_params.document_cookie = params.params.document_cookie;
   page_params.actual_shrink = actual_shrink;
@@ skipping 152 matching lines @@
     shared_buf.Unmap();
     return false;
   }
   shared_buf.GiveToProcess(base::GetCurrentProcessHandle(), shared_mem_handle);
   shared_buf.Unmap();
 
   Send(new PrintHostMsg_DuplicateSection(routing_id(), *shared_mem_handle,
                                          shared_mem_handle));
   return true;
 }