Revert of Check for an active document in WebPluginContainerImpl::windowClipRect

Source/web/WebPluginContainerImpl.cpp

Index: Source/web/WebPluginContainerImpl.cpp
diff --git a/Source/web/WebPluginContainerImpl.cpp b/Source/web/WebPluginContainerImpl.cpp
index 7f52011114eb2ca900bad3b8a0aeaf36112a1397..f9ada22df6e61510479b5c639df71d9d0a608d86 100644
--- a/Source/web/WebPluginContainerImpl.cpp
+++ b/Source/web/WebPluginContainerImpl.cpp
@@ -972,7 +972,10 @@
     IntRect clipRect =
         convertToContainingWindow(IntRect(0, 0, width(), height()));
 
-    if (m_element->document().isActive()) {
+    // document().renderView() can be 0 when we receive messages from the
+    // plugins while we are destroying a frame.
+    // FIXME: Can we just check m_element->document().isActive() ?
+    if (m_element->renderer()->document().renderView()) {
         // Take our element and get the clip rect from the enclosing layer and
         // frame view.
         clipRect.intersect(