Remove snapshots-related code that is implemented in DevTools heap profiler.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 6a3fd2b2b2dfff6f07fbe4f61c976a701cab8845..0d5e4f0685797865dabbdbac9bc11f36818057b4 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -5288,34 +5288,6 @@ const HeapGraphNode* HeapGraphEdge::GetToNode() const {
 }
 
 
-static i::HeapGraphPath* ToInternal(const HeapGraphPath* path) {
-  return const_cast<i::HeapGraphPath*>(
-      reinterpret_cast<const i::HeapGraphPath*>(path));
-}
-
-
-int HeapGraphPath::GetEdgesCount() const {
-  return ToInternal(this)->path()->length();
-}
-
-
-const HeapGraphEdge* HeapGraphPath::GetEdge(int index) const {
-  return reinterpret_cast<const HeapGraphEdge*>(
-      ToInternal(this)->path()->at(index));
-}
-
-
-const HeapGraphNode* HeapGraphPath::GetFromNode() const {
-  return GetEdgesCount() > 0 ? GetEdge(0)->GetFromNode() : NULL;
-}
-
-
-const HeapGraphNode* HeapGraphPath::GetToNode() const {
-  const int count = GetEdgesCount();
-  return count > 0 ? GetEdge(count - 1)->GetToNode() : NULL;
-}
-
-
 static i::HeapEntry* ToInternal(const HeapGraphNode* entry) {
   return const_cast<i::HeapEntry*>(
       reinterpret_cast<const i::HeapEntry*>(entry));
@@ -5397,21 +5369,6 @@ const HeapGraphEdge* HeapGraphNode::GetRetainer(int index) const {
 }
 
 
-int HeapGraphNode::GetRetainingPathsCount() const {
-  i::Isolate* isolate = i::Isolate::Current();
-  IsDeadCheck(isolate, "v8::HeapSnapshot::GetRetainingPathsCount");
-  return ToInternal(this)->GetRetainingPaths()->length();
-}
-
-
-const HeapGraphPath* HeapGraphNode::GetRetainingPath(int index) const {
-  i::Isolate* isolate = i::Isolate::Current();
-  IsDeadCheck(isolate, "v8::HeapSnapshot::GetRetainingPath");
-  return reinterpret_cast<const HeapGraphPath*>(
-      ToInternal(this)->GetRetainingPaths()->at(index));
-}
-
-
 const HeapGraphNode* HeapGraphNode::GetDominatorNode() const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetDominatorNode");
@@ -5419,26 +5376,6 @@ const HeapGraphNode* HeapGraphNode::GetDominatorNode() const {
 }
 
 
-const HeapGraphNode* HeapSnapshotsDiff::GetAdditionsRoot() const {
-  i::Isolate* isolate = i::Isolate::Current();
-  IsDeadCheck(isolate, "v8::HeapSnapshotsDiff::GetAdditionsRoot");
-  i::HeapSnapshotsDiff* diff =
-      const_cast<i::HeapSnapshotsDiff*>(
-          reinterpret_cast<const i::HeapSnapshotsDiff*>(this));
-  return reinterpret_cast<const HeapGraphNode*>(diff->additions_root());
-}
-
-
-const HeapGraphNode* HeapSnapshotsDiff::GetDeletionsRoot() const {
-  i::Isolate* isolate = i::Isolate::Current();
-  IsDeadCheck(isolate, "v8::HeapSnapshotsDiff::GetDeletionsRoot");
-  i::HeapSnapshotsDiff* diff =
-      const_cast<i::HeapSnapshotsDiff*>(
-          reinterpret_cast<const i::HeapSnapshotsDiff*>(this));
-  return reinterpret_cast<const HeapGraphNode*>(diff->deletions_root());
-}
-
-
 static i::HeapSnapshot* ToInternal(const HeapSnapshot* snapshot) {
   return const_cast<i::HeapSnapshot*>(
       reinterpret_cast<const i::HeapSnapshot*>(snapshot));
@@ -5494,15 +5431,6 @@ const HeapGraphNode* HeapSnapshot::GetNodeById(uint64_t id) const {
 }
 
 
-const HeapSnapshotsDiff* HeapSnapshot::CompareWith(
-    const HeapSnapshot* snapshot) const {
-  i::Isolate* isolate = i::Isolate::Current();
-  IsDeadCheck(isolate, "v8::HeapSnapshot::CompareWith");
-  return reinterpret_cast<const HeapSnapshotsDiff*>(
-      ToInternal(this)->CompareWith(ToInternal(snapshot)));
-}
-
-
 void HeapSnapshot::Serialize(OutputStream* stream,
                              HeapSnapshot::SerializationFormat format) const {
   i::Isolate* isolate = i::Isolate::Current();