Don't change layout size due to top control show/hide

third_party/WebKit/Source/core/css/resolver/ViewportStyleResolver.cpp

Index: third_party/WebKit/Source/core/css/resolver/ViewportStyleResolver.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/ViewportStyleResolver.cpp b/third_party/WebKit/Source/core/css/resolver/ViewportStyleResolver.cpp
index 642508cb14e55c9ad3c6b410b8ff7fba5d0cbe8b..07973f3bcba2f00ad763a55c970cca893201dbe4 100644
--- a/third_party/WebKit/Source/core/css/resolver/ViewportStyleResolver.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/ViewportStyleResolver.cpp
@@ -39,8 +39,8 @@
 #include "core/dom/Document.h"
 #include "core/dom/NodeComputedStyle.h"
 #include "core/dom/ViewportDescription.h"
-#include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
+#include "core/layout/LayoutView.h"
 
 namespace blink {
 
@@ -201,9 +201,9 @@ Length ViewportStyleResolver::viewportLengthValue(CSSPropertyID id) const
     bool documentStyleHasViewportUnits = documentStyle->hasViewportUnits();
     documentStyle->setHasViewportUnits(false);
 
-    FrameView* view = m_document->view();
-    float width = view ? view->width() : 0;
-    float height = view ? view->height() : 0;
+    LayoutView* view = m_document->layoutView();
+    float width = view ? view->viewportSizeForViewportUnits().width() : 0;
+    float height = view ? view->viewportSizeForViewportUnits().height() : 0;
 
     CSSToLengthConversionData::FontSizes fontSizes(documentStyle, documentStyle);
     CSSToLengthConversionData::ViewportSize viewportSize(width, height);