Normalize top controls offset to (0, 1), Blink-side.

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 8719a5cb54f75337a148d4f9214e500354054bb0..6269715a9f2224d884e3b0ce91bc56b8ddbc3933 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -3086,10 +3086,6 @@ void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation o
 
 void FrameView::setTopControlsViewportAdjustment(float adjustment)
 {
-#if !OS(ANDROID)
-    // The adjustment is done only for top controls which are android only.
-    ASSERT(!adjustment);
-#endif
     m_topControlsViewportAdjustment = adjustment;
 }