Refactoring: Add convenience method toPluginContainerImpl.

Source/web/WebFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 263 matching lines @@
     return ++next;
 }
 
 WebPluginContainerImpl* WebFrameImpl::pluginContainerFromFrame(Frame* frame)
 {
     if (!frame)
         return 0;
     if (!frame->document() || !frame->document()->isPluginDocument())
         return 0;
     PluginDocument* pluginDocument = static_cast<PluginDocument*>(frame->document());
-    return static_cast<WebPluginContainerImpl *>(pluginDocument->pluginWidget());
+    return toPluginContainerImpl(pluginDocument->pluginWidget());
 }
 
 WebPluginContainerImpl* WebFrameImpl::pluginContainerFromNode(WebCore::Frame* frame, const WebNode& node)
 {
     WebPluginContainerImpl* pluginContainer = pluginContainerFromFrame(frame);
     if (pluginContainer)
         return pluginContainer;
-    return static_cast<WebPluginContainerImpl*>(node.pluginContainer());
+    return toPluginContainerImpl(node.pluginContainer());
 }
 
 // Simple class to override some of PrintContext behavior. Some of the methods
 // made virtual so that they can be overridden by ChromePluginPrintContext.
 class ChromePrintContext : public PrintContext {
     WTF_MAKE_NONCOPYABLE(ChromePrintContext);
 public:
     ChromePrintContext(Frame* frame)
         : PrintContext(frame)
         , m_printedPageWidth(0)
@@ skipping 1086 matching lines @@
 int WebFrameImpl::printBegin(const WebPrintParams& printParams, const WebNode& constrainToNode, bool* useBrowserOverlays)
 {
     ASSERT(!frame()->document()->isFrameSet());
     WebPluginContainerImpl* pluginContainer = 0;
     if (constrainToNode.isNull()) {
         // If this is a plugin document, check if the plugin supports its own
         // printing. If it does, we will delegate all printing to that.
         pluginContainer = pluginContainerFromFrame(frame());
     } else {
         // We only support printing plugin nodes for now.
-        pluginContainer = static_cast<WebPluginContainerImpl*>(constrainToNode.pluginContainer());
+        pluginContainer = toPluginContainerImpl(constrainToNode.pluginContainer());
     }
 
     if (pluginContainer && pluginContainer->supportsPaginatedPrint())
         m_printContext = adoptPtr(new ChromePluginPrintContext(frame(), pluginContainer, printParams));
     else
         m_printContext = adoptPtr(new ChromePrintContext(frame()));
 
     FloatRect rect(0, 0, static_cast<float>(printParams.printContentArea.width), static_cast<float>(printParams.printContentArea.height));
     m_printContext->begin(rect.width(), rect.height());
     float pageHeight;
@@ skipping 27 matching lines @@
 
 void WebFrameImpl::printEnd()
 {
     ASSERT(m_printContext);
     m_printContext->end();
     m_printContext.clear();
 }
 
 bool WebFrameImpl::isPrintScalingDisabledForPlugin(const WebNode& node)
 {
-    WebPluginContainerImpl* pluginContainer =  node.isNull() ? pluginContainerFromFrame(frame()) : static_cast<WebPluginContainerImpl*>(node.pluginContainer());
+    WebPluginContainerImpl* pluginContainer =  node.isNull() ? pluginContainerFromFrame(frame()) : toPluginContainerImpl(node.pluginContainer());
 
     if (!pluginContainer || !pluginContainer->supportsPaginatedPrint())
         return false;
 
     return pluginContainer->isPrintScalingDisabled();
 }
 
 bool WebFrameImpl::hasCustomPageSizeStyle(int pageIndex)
 {
     return frame()->document()->styleForPage(pageIndex)->pageSizeType() != PAGE_SIZE_AUTO;
@@ skipping 1025 matching lines @@
 
         // There is a possibility that the frame being detached was the only
         // pending one. We need to make sure final replies can be sent.
         flushCurrentScopingEffort(m_findRequestIdentifier);
 
         cancelPendingScopingEffort();
     }
 }
 
 } // namespace WebKit