Replace remaining ASSERT with DCHECK/_EQ as appropriate

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

Index: third_party/WebKit/Source/core/page/FrameTree.cpp
diff --git a/third_party/WebKit/Source/core/page/FrameTree.cpp b/third_party/WebKit/Source/core/page/FrameTree.cpp
index 29d2a49089d485622075f03d89e80fc5cb4d1aeb..cb492e67a9a8b82249eb68df941bd2440ceac657 100644
--- a/third_party/WebKit/Source/core/page/FrameTree.cpp
+++ b/third_party/WebKit/Source/core/page/FrameTree.cpp
@@ -217,7 +217,7 @@ DISABLE_CFI_PERF
 Frame* FrameTree::TraverseNext(const Frame* stay_within) const {
   Frame* child = FirstChild();
   if (child) {
-    ASSERT(!stay_within || child->Tree().IsDescendantOf(stay_within));
+    DCHECK(!stay_within || child->Tree().IsDescendantOf(stay_within));
     return child;
   }
 
@@ -226,7 +226,7 @@ Frame* FrameTree::TraverseNext(const Frame* stay_within) const {
 
   Frame* sibling = NextSibling();
   if (sibling) {
-    ASSERT(!stay_within || sibling->Tree().IsDescendantOf(stay_within));
+    DCHECK(!stay_within || sibling->Tree().IsDescendantOf(stay_within));
     return sibling;
   }
 
@@ -239,7 +239,7 @@ Frame* FrameTree::TraverseNext(const Frame* stay_within) const {
   }
 
   if (frame) {
-    ASSERT(!stay_within || !sibling ||
+    DCHECK(!stay_within || !sibling ||
            sibling->Tree().IsDescendantOf(stay_within));
     return sibling;
   }