Replace ASSERT with DCHECK in core/

third_party/WebKit/Source/core/page/scrolling/ScrollState.cpp

Index: third_party/WebKit/Source/core/page/scrolling/ScrollState.cpp
diff --git a/third_party/WebKit/Source/core/page/scrolling/ScrollState.cpp b/third_party/WebKit/Source/core/page/scrolling/ScrollState.cpp
index c28dc3770c577fcfcaf88c1f737a99ab704d2db8..12053e2f735c1fceb889ad83582c232b706f73cc 100644
--- a/third_party/WebKit/Source/core/page/scrolling/ScrollState.cpp
+++ b/third_party/WebKit/Source/core/page/scrolling/ScrollState.cpp
@@ -16,10 +16,10 @@ namespace blink {
 namespace {
 Element* ElementForId(int element_id) {
   Node* node = DOMNodeIds::NodeForId(element_id);
-  ASSERT(node);
+  DCHECK(node);
   if (!node)
     return nullptr;
-  ASSERT(node->IsElementNode());
+  DCHECK(node->IsElementNode());
   if (!node->IsElementNode())
     return nullptr;
   return static_cast<Element*>(node);