OOPIF: Check whether localFrameRootTemporary is valid when processing resizing messages

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 83a3349f09e1dd989f3acd08a834a5fffb1524c4..69556273365d98db98f33b4329d0401f2c7cee01 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -1712,7 +1712,11 @@ void WebViewImpl::setTopControlsLayoutHeight(float height)
 
 void WebViewImpl::didUpdateTopControls()
 {
-    FrameView* view = localFrameRootTemporary()->frameView();
+    WebLocalFrameImpl* localFrameRoot = localFrameRootTemporary();
+    if (!localFrameRoot)
+        return;
+
+    FrameView* view = localFrameRoot->frameView();
     if (!view)
         return;
 
@@ -1728,7 +1732,11 @@ void WebViewImpl::resize(const WebSize& newSize)
     if (m_shouldAutoResize || m_size == newSize)
         return;
 
-    FrameView* view = localFrameRootTemporary()->frameView();
+    WebLocalFrameImpl* localFrameRoot = localFrameRootTemporary();
+    if (!localFrameRoot)
+        return;
+
+    FrameView* view = localFrameRoot->frameView();
     if (!view)
         return;