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

include/v8-profiler.h

Index: include/v8-profiler.h
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index a7b4d31ac2cfdf31f73df17ba1e19213bb185d64..db56e268e389cb615dc226640687ee8674b0ea4d 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -240,22 +240,6 @@ class V8EXPORT HeapGraphEdge {
 };
 
 
-class V8EXPORT HeapGraphPath {
- public:
-  /** Returns the number of edges in the path. */
-  int GetEdgesCount() const;
-
-  /** Returns an edge from the path. */
-  const HeapGraphEdge* GetEdge(int index) const;
-
-  /** Returns origin node. */
-  const HeapGraphNode* GetFromNode() const;
-
-  /** Returns destination node. */
-  const HeapGraphNode* GetToNode() const;
-};
-
-
 /**
  * HeapGraphNode represents a node in a heap graph.
  */
@@ -325,12 +309,6 @@ class V8EXPORT HeapGraphNode {
   /** Returns a retainer by index. */
   const HeapGraphEdge* GetRetainer(int index) const;
 
-  /** Returns the number of simple retaining paths from the root to the node. */
-  int GetRetainingPathsCount() const;
-
-  /** Returns a retaining path by index. */
-  const HeapGraphPath* GetRetainingPath(int index) const;
-
   /**
    * Returns a dominator node. This is the node that participates in every
    * path from the snapshot root to the current node.
@@ -339,16 +317,6 @@ class V8EXPORT HeapGraphNode {
 };
 
 
-class V8EXPORT HeapSnapshotsDiff {
- public:
-  /** Returns the root node for added nodes. */
-  const HeapGraphNode* GetAdditionsRoot() const;
-
-  /** Returns the root node for deleted nodes. */
-  const HeapGraphNode* GetDeletionsRoot() const;
-};
-
-
 /**
  * HeapSnapshots record the state of the JS heap at some moment.
  */
@@ -379,12 +347,6 @@ class V8EXPORT HeapSnapshot {
   const HeapGraphNode* GetNodeById(uint64_t id) const;
 
   /**
-   * Returns a diff between this snapshot and another one. Only snapshots
-   * of the same type can be compared.
-   */
-  const HeapSnapshotsDiff* CompareWith(const HeapSnapshot* snapshot) const;
-
-  /**
    * Deletes the snapshot and removes it from HeapProfiler's list.
    * All pointers to nodes, edges and paths previously returned become
    * invalid.