Remove FrameViewBase as base class of PluginView.

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index f38a80e5fa6048784cd43d080aa45094efbfdb5a..44f8c504d9c342534b45e7b1849249706ecbb9f8 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -1506,8 +1506,9 @@ void FrameView::UpdateGeometries() {
     if (GetLayoutViewItem().IsNull())
       break;
 
-    if (FrameViewBase* frame_view_base = part->PluginOrFrame()) {
-      if (frame_view_base->IsFrameView()) {
+    if (FrameOrPlugin* frame_or_plugin = part->GetFrameOrPlugin()) {
+      FrameViewBase* frame_view_base = part->GetFrameViewBase();
+      if (frame_view_base && frame_view_base->IsFrameView()) {
         FrameView* frame_view = ToFrameView(frame_view_base);
         bool did_need_layout = frame_view->NeedsLayout();
         part->UpdateGeometry();