mac: Use ScopedCGContextSaveGState in a few more places

webkit/plugins/ppapi/ppapi_plugin_instance.cc

Index: webkit/plugins/ppapi/ppapi_plugin_instance.cc
diff --git a/webkit/plugins/ppapi/ppapi_plugin_instance.cc b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
index 11378904d637a7e86fd18a7db0a6c42dd43b9cca..d1a1a1d2899bf4c38ef3db790c7d3824b1220d81 100644
--- a/webkit/plugins/ppapi/ppapi_plugin_instance.cc
+++ b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
@@ -60,6 +60,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "ui/base/range/range.h"
+#include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 #include "webkit/plugins/plugin_constants.h"
 #include "webkit/plugins/ppapi/common.h"
 #include "webkit/plugins/ppapi/event_conversion.h"
@@ -1620,7 +1621,7 @@ bool PluginInstance::PrintPDFOutput(PP_Resource print_output,
   if (metafile.InitFromData(mapper.data(), mapper.size())) {
     // Flip the transform.
     CGContextRef cgContext = canvas;
-    CGContextSaveGState(cgContext);
+    gfx::ScopedCGContextSaveGState save_gstate(cgContext)
     CGContextTranslateCTM(cgContext, 0,
                           current_print_settings_.printable_area.size.height);
     CGContextScaleCTM(cgContext, 1.0, -1.0);
@@ -1631,7 +1632,6 @@ bool PluginInstance::PrintPDFOutput(PP_Resource print_output,
     page_rect.size.height = current_print_settings_.printable_area.size.height;
 
     ret = metafile.RenderPage(1, cgContext, page_rect, true, false, true, true);
-    CGContextRestoreGState(cgContext);
   }
 #elif defined(OS_WIN)
   printing::Metafile* metafile =