Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/core/page/Page.cpp

Index: third_party/WebKit/Source/core/page/Page.cpp
diff --git a/third_party/WebKit/Source/core/page/Page.cpp b/third_party/WebKit/Source/core/page/Page.cpp
index 50684c3e4732bfb1bb176a7f1530508540e1bb8e..671df370fac839db6c8234d103ea9fd01ef244f4 100644
--- a/third_party/WebKit/Source/core/page/Page.cpp
+++ b/third_party/WebKit/Source/core/page/Page.cpp
@@ -135,9 +135,6 @@ Page::Page(PageClients& pageClients)
       m_deviceScaleFactor(1),
       m_visibilityState(PageVisibilityStateVisible),
       m_isCursorVisible(true),
-#if ENABLE(ASSERT)
-      m_isPainting(false),
-#endif
       m_frameHost(FrameHost::create(*this)) {
   ASSERT(m_editorClient);