Fix print preview clipping issues due to scaling.

printing/pdf_metafile_skia.cc

Index: printing/pdf_metafile_skia.cc
===================================================================
--- printing/pdf_metafile_skia.cc	(revision 82287)
+++ printing/pdf_metafile_skia.cc	(working copy)
@@ -37,8 +37,8 @@
 }
 
 skia::PlatformDevice* PdfMetafileSkia::StartPageForVectorCanvas(
-    const gfx::Size& page_size, const gfx::Point& content_origin,
-    const float& scale_factor) {
+    const gfx::Size& page_size, const gfx::Size& content_size,
+    const gfx::Point& content_origin, const float& scale_factor) {
   DCHECK(data_->current_page_.get() == NULL);
 
   // Adjust for the margins and apply the scale factor.
@@ -48,9 +48,16 @@
   transform.preScale(SkFloatToScalar(scale_factor),
                      SkFloatToScalar(scale_factor));
 
+  SkRefPtr<SkPDFDevice> pdf_device =
+      new SkPDFDevice(SkSize::Make(
+                          SkIntToScalar(page_size.width()),
+                          SkIntToScalar(page_size.height())),
+                      SkSize::Make(
+                          SkIntToScalar(content_size.width()),
+                          SkIntToScalar(content_size.height())), transform);
+  pdf_device->unref();  // SkRefPtr and new both took a reference.
   skia::VectorPlatformDeviceSkia* device =
-      new skia::VectorPlatformDeviceSkia(page_size.width(), page_size.height(),
-                                         transform);
+      new skia::VectorPlatformDeviceSkia(pdf_device.get(), transform);
   data_->current_page_ = device->PdfDevice();
   return device;
 }