Use refs for GraphicsContext

third_party/WebKit/Source/web/WebPluginContainerImpl.cpp

Index: third_party/WebKit/Source/web/WebPluginContainerImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebPluginContainerImpl.cpp b/third_party/WebKit/Source/web/WebPluginContainerImpl.cpp
index 64ee6a63899d6412e41b9b5584ab37e14c270921..62167d4fee4dad206e1b1c4d5898d250fc2b7d54 100644
--- a/third_party/WebKit/Source/web/WebPluginContainerImpl.cpp
+++ b/third_party/WebKit/Source/web/WebPluginContainerImpl.cpp
@@ -339,16 +339,16 @@ int WebPluginContainerImpl::printBegin(const WebPrintParams& printParams) const
     return m_webPlugin->printBegin(printParams);
 }
 
-void WebPluginContainerImpl::printPage(int pageNumber, GraphicsContext* gc, const IntRect& printRect)
+void WebPluginContainerImpl::printPage(int pageNumber, GraphicsContext& gc, const IntRect& printRect)
 {
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*gc, *m_element->layoutObject(), DisplayItem::Type::WebPlugin, LayoutPoint()))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(gc, *m_element->layoutObject(), DisplayItem::Type::WebPlugin, LayoutPoint()))
         return;
 
-    LayoutObjectDrawingRecorder drawingRecorder(*gc, *m_element->layoutObject(), DisplayItem::Type::WebPlugin, printRect, LayoutPoint());
-    gc->save();
-    WebCanvas* canvas = gc->canvas();
+    LayoutObjectDrawingRecorder drawingRecorder(gc, *m_element->layoutObject(), DisplayItem::Type::WebPlugin, printRect, LayoutPoint());
+    gc.save();
+    WebCanvas* canvas = gc.canvas();
     m_webPlugin->printPage(pageNumber, canvas);
-    gc->restore();
+    gc.restore();
 }
 
 void WebPluginContainerImpl::printEnd()