Remove some RenderProcessHost::IsGuest call sites

content/browser/web_contents/web_contents_view_aura.cc

Index: content/browser/web_contents/web_contents_view_aura.cc
diff --git a/content/browser/web_contents/web_contents_view_aura.cc b/content/browser/web_contents/web_contents_view_aura.cc
index f87411e41860532598470427737091c51fdb455b..6937008f183f0ffffb6e18a9fa3c49f81450ec8b 100644
--- a/content/browser/web_contents/web_contents_view_aura.cc
+++ b/content/browser/web_contents/web_contents_view_aura.cc
@@ -102,9 +102,11 @@ RenderWidgetHostViewAura* ToRenderWidgetHostViewAura(
     RenderWidgetHostView* view) {
   if (!view || RenderViewHostFactory::has_factory())
     return NULL;  // Can't cast to RenderWidgetHostViewAura in unit tests.
-  RenderProcessHostImpl* process = static_cast<RenderProcessHostImpl*>(
-      view->GetRenderWidgetHost()->GetProcess());
-  if (process->IsGuest())
+
+  RenderViewHost* rvh = RenderViewHost::From(view->GetRenderWidgetHost());
+  WebContentsImpl* web_contents = static_cast<WebContentsImpl*>(
+      rvh ? WebContents::FromRenderViewHost(rvh) : NULL);
+  if (web_contents && !!web_contents->GetBrowserPluginGuest())
     return NULL;
   return static_cast<RenderWidgetHostViewAura*>(view);
 }
@@ -1067,7 +1069,7 @@ void WebContentsViewAura::CreateView(
   // The use cases for WindowObserver do not apply to Browser Plugins:
   // 1) guests do not support NPAPI plugins.
   // 2) guests' window bounds are supposed to come from its embedder.
-  if (!web_contents_->GetRenderProcessHost()->IsGuest())
+  if (!web_contents_->GetBrowserPluginGuest())
     window_observer_.reset(new WindowObserver(this));
 
   // delegate_->GetDragDestDelegate() creates a new delegate on every call.