Use SortedListBSearch instead of custom one in heap profiler

src/profile-generator.cc

Index: src/profile-generator.cc
===================================================================
--- src/profile-generator.cc	(revision 11246)
+++ src/profile-generator.cc	(working copy)
@@ -1256,24 +1256,25 @@
 }
 
 
+class FindEntryById {
+ public:
+  explicit FindEntryById(SnapshotObjectId id) : id_(id) { }
+  int operator()(HeapEntry* const* entry) {
+    if ((*entry)->id() == id_) return 0;
+    return (*entry)->id() < id_ ? -1 : 1;
+  }
+ private:
+  SnapshotObjectId id_;
+};
+
+
 HeapEntry* HeapSnapshot::GetEntryById(SnapshotObjectId id) {
   List<HeapEntry*>* entries_by_id = GetSortedEntriesList();
-
   // Perform a binary search by id.
-  int low = 0;
-  int high = entries_by_id->length() - 1;
-  while (low <= high) {
-    int mid =
-        (static_cast<unsigned int>(low) + static_cast<unsigned int>(high)) >> 1;
-    SnapshotObjectId mid_id = entries_by_id->at(mid)->id();
-    if (mid_id > id)
-      high = mid - 1;
-    else if (mid_id < id)
-      low = mid + 1;
-    else
-      return entries_by_id->at(mid);
-  }
-  return NULL;
+  int index = SortedListBSearch(*entries_by_id, FindEntryById(id));
+  if (index == -1)
+    return NULL;
+  return entries_by_id->at(index);
 }