Allow assertions to be enabled in Blink Release builds.

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 ee8f36b866f2731d1925f0acc8bc5f6ab202c92c..5dfe396c492c156d84ea8364dfced26f23cce545 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -991,7 +991,7 @@ void FrameView::layout(bool allowSubtree)
     if (m_nestedLayoutCount)
         return;
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     // Post-layout assert that nobody was re-marked as needing layout during layout.
     document->renderView()->assertSubtreeIsLaidOut();
 #endif
@@ -2736,7 +2736,7 @@ void FrameView::paintContents(GraphicsContext* p, const IntRect& rect)
     RenderObject* renderer = m_nodeToDraw ? m_nodeToDraw->renderer() : 0;
     RenderLayer* rootLayer = renderView->layer();
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     renderView->assertSubtreeIsLaidOut();
     RenderObject::SetLayoutNeededForbiddenScope forbidSetNeedsLayout(*rootLayer->renderer());
 #endif
@@ -2873,7 +2873,7 @@ void FrameView::updateLayoutAndStyleIfNeededRecursive()
     // These asserts ensure that parent frames are clean, when child frames finished updating layout and style.
     ASSERT(!needsLayout());
     ASSERT(!m_frame->document()->hasSVGFilterElementsRequiringLayerUpdate());
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     m_frame->document()->renderView()->assertRendererLaidOut();
 #endif