Move Start/EndPage() from NewPage/PageDone() to inside the metafile.

chrome/renderer/print_web_view_helper_win.cc

Index: chrome/renderer/print_web_view_helper_win.cc
diff --git a/chrome/renderer/print_web_view_helper_win.cc b/chrome/renderer/print_web_view_helper_win.cc
index f81b93a79c801089f3dcc4145ebf035d5a7fd0b8..72e3399f42e3a596a7f56ec4a6a767ea07c57ad9 100644
--- a/chrome/renderer/print_web_view_helper_win.cc
+++ b/chrome/renderer/print_web_view_helper_win.cc
@@ -209,6 +209,9 @@ void PrintWebViewHelper::RenderPage(
   int width = static_cast<int>(content_width_in_points * params.max_shrink);
   int height = static_cast<int>(content_height_in_points * params.max_shrink);
 
+  bool result = (*metafile)->StartPage();
+  DCHECK(result);
+
 #if 0
   // TODO(maruel): This code is kept for testing until the 100% GDI drawing
   // code is stable. maruels use this code's output as a reference when the
@@ -255,6 +258,9 @@ void PrintWebViewHelper::RenderPage(
   }
 #endif
 
+  result = (*metafile)->FinishPage();
+  DCHECK(result);
+
   skia::VectorPlatformDevice* platform_device =
       static_cast<skia::VectorPlatformDevice*>(canvas.getDevice());
   if (platform_device->alpha_blend_used() && !params.supports_alpha_blend) {