Fix print preview clipping issues due to scaling.

printing/pdf_metafile_cg_mac.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 "printing/pdf_metafile_cg_mac.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/sys_string_conversions.h"
@@ skipping 46 matching lines @@
   }
 
   pdf_data_.reset(CFDataCreateMutable(kCFAllocatorDefault, src_buffer_size));
   CFDataAppendBytes(pdf_data_, static_cast<const UInt8*>(src_buffer),
                     src_buffer_size);
 
   return true;
 }
 
 skia::PlatformDevice* PdfMetafileCg::StartPageForVectorCanvas(
-    const gfx::Size& page_size, const gfx::Point& content_origin,
+    const gfx::Size& page_size, const gfx::Rect& content_area,
     const float& scale_factor) {
   NOTIMPLEMENTED();
   return NULL;
 }
 
 bool PdfMetafileCg::StartPage(const gfx::Size& page_size,
-                              const gfx::Point& content_origin,
+                              const gfx::Rect& content_area,
                               const float& scale_factor) {
   DCHECK(context_.get());
   DCHECK(!page_is_open_);
 
   double height = page_size.height();
   double width = page_size.width();
 
   CGRect bounds = CGRectMake(0, 0, width, height);
   CGContextBeginPage(context_, &bounds);
   page_is_open_ = true;
   CGContextSaveGState(context_);
 
   // Flip the context.
   CGContextTranslateCTM(context_, 0, height);
   CGContextScaleCTM(context_, scale_factor, -scale_factor);
 
-  // Move the context to origin.
-  CGContextTranslateCTM(context_, content_origin.x(), content_origin.y());
+  // Move to the context origin.
+  CGContextTranslateCTM(context_, content_area.x(), content_area.y());
 
   return context_.get() != NULL;
 }
 
 bool PdfMetafileCg::FinishPage() {
   DCHECK(context_.get());
   DCHECK(page_is_open_);
 
   CGContextRestoreGState(context_);
   CGContextEndPage(context_);
@@ skipping 145 matching lines @@
 
   if (!pdf_doc_.get()) {
     ScopedCFTypeRef<CGDataProviderRef> pdf_data_provider(
         CGDataProviderCreateWithCFData(pdf_data_));
     pdf_doc_.reset(CGPDFDocumentCreateWithProvider(pdf_data_provider));
   }
   return pdf_doc_.get();
 }
 
 }  // namespace printing