Remove unused helpers to selectively traverse through only local frames.

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
index 68290988d0e60bcbfdc241d3de062bb1099d008b..73a6abcdd1837bf0846c1f7c93da395032d2e991 100644
--- a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
@@ -1817,22 +1817,6 @@ WebLocalFrameImpl* WebLocalFrameImpl::localRoot()
     return localRoot;
 }
 
-WebLocalFrame* WebLocalFrameImpl::traversePreviousLocal(bool wrap) const
-{
-    WebFrame* previousLocalFrame = this->traversePrevious(wrap);
-    while (previousLocalFrame && !previousLocalFrame->isWebLocalFrame())
-        previousLocalFrame = previousLocalFrame->traversePrevious(wrap);
-    return previousLocalFrame ? previousLocalFrame->toWebLocalFrame() : nullptr;
-}
-
-WebLocalFrame* WebLocalFrameImpl::traverseNextLocal(bool wrap) const
-{
-    WebFrame* nextLocalFrame = this->traverseNext(wrap);
-    while (nextLocalFrame && !nextLocalFrame->isWebLocalFrame())
-        nextLocalFrame = nextLocalFrame->traverseNext(wrap);
-    return nextLocalFrame ? nextLocalFrame->toWebLocalFrame() : nullptr;
-}
-
 void WebLocalFrameImpl::sendPings(const WebURL& destinationURL)
 {
     DCHECK(frame());