Add name inference for anonymous functions to facilitate debugging and profiling of JS code.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 63480eb08e1e3bec4d44cffdf2963b31f8c7a9f3..0e178081e506b5e14ccbf07dbcdf8e9270ea7617 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2665,6 +2665,13 @@ class SharedFunctionInfo: public HeapObject {
   // [debug info]: Debug information.
   DECL_ACCESSORS(debug_info, Object)
 
+  // [inferred name]: Name inferred from variable or property
+  // assignment of this function. Used to facilitate debugging and
+  // profiling of JavaScript code written in OO style, where almost
+  // all functions are anonymous but are assigned to object
+  // properties.
+  DECL_ACCESSORS(inferred_name, String)
+
   // Position of the 'function' token in the script source.
   inline int function_token_position();
   inline void set_function_token_position(int function_token_position);
@@ -2724,7 +2731,8 @@ class SharedFunctionInfo: public HeapObject {
   static const int kEndPositionOffset = kStartPositionAndTypeOffset + kIntSize;
   static const int kFunctionTokenPositionOffset = kEndPositionOffset + kIntSize;
   static const int kDebugInfoOffset = kFunctionTokenPositionOffset + kIntSize;
-  static const int kSize = kDebugInfoOffset + kPointerSize;
+  static const int kInferredNameOffset = kDebugInfoOffset + kPointerSize;
+  static const int kSize = kInferredNameOffset + kPointerSize;
 
  private:
   // Bit positions in length_and_flg.