Fix print preview clipping issues due to scaling.

printing/pdf_metafile_cairo_linux.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_cairo_linux.h"
 
 #include <stdio.h>
 
 #include <cairo.h>
 #include <cairo-pdf.h>
@@ skipping 101 matching lines @@
   if (src_buffer == NULL || src_buffer_size == 0)
     return false;
 
   raw_data_ = std::string(reinterpret_cast<const char*>(src_buffer),
                       src_buffer_size);
   current_data_ = &raw_data_;
   return true;
 }
 
 skia::PlatformDevice* PdfMetafileCairo::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) {
-  if (!StartPage(page_size, content_origin, scale_factor))
+  if (!StartPage(page_size, content_area, scale_factor))
     return NULL;
 
   return skia::VectorPlatformDeviceCairoFactory::CreateDevice(
       context_, page_size.width(), page_size.height(), true);
 }
 
 bool PdfMetafileCairo::StartPage(const gfx::Size& page_size,
-                                 const gfx::Point& content_origin,
+                                 const gfx::Rect& content_area,
                                  const float& scale_factor) {
   DCHECK(IsSurfaceValid(surface_));
   DCHECK(IsContextValid(context_));
   // Passing this check implies page_surface_ is NULL, and current_page_ is
   // empty.
   DCHECK_GT(page_size.width(), 0);
   DCHECK_GT(page_size.height(), 0);
   // |scale_factor| is not supported yet.
   DCHECK_EQ(scale_factor, 1);
 
   // Don't let WebKit draw over the margins.
   cairo_surface_set_device_offset(surface_,
-                                  content_origin.x(),
-                                  content_origin.y());
+                                  content_area.x(),
+                                  content_area.y());
 
   cairo_pdf_surface_set_size(surface_, page_size.width(), page_size.height());
   return context_ != NULL;
 }
 
 bool PdfMetafileCairo::FinishPage() {
   DCHECK(IsSurfaceValid(surface_));
   DCHECK(IsContextValid(context_));
 
   // Flushes all rendering for current page.
@@ skipping 93 matching lines @@
 
 void PdfMetafileCairo::CleanUpAll() {
   CleanUpContext(&context_);
   CleanUpSurface(&surface_);
   cairo_data_.clear();
   raw_data_.clear();
   skia::VectorPlatformDeviceCairo::ClearFontCache();
 }
 
 }  // namespace printing