Add initial version of retainers heap profile.

src/SConscript

 # Copyright 2008 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 24 matching lines @@
 
 SOURCES = {
   'all': [
     'accessors.cc', 'allocation.cc', 'api.cc', 'assembler.cc', 'ast.cc',
     'bootstrapper.cc', 'builtins.cc', 'checks.cc', 'cfg.cc',
     'code-stubs.cc', 'codegen.cc', 'compilation-cache.cc', 'compiler.cc',
     'contexts.cc', 'conversions.cc', 'counters.cc', 'dateparser.cc',
     'debug.cc', 'debug-agent.cc', 'disassembler.cc', 'execution.cc',
     'factory.cc', 'flags.cc', 'frame-element.cc', 'frames.cc',
     'func-name-inferrer.cc', 'global-handles.cc', 'handles.cc',
-    'hashmap.cc', 'heap.cc', 'ic.cc', 'interpreter-irregexp.cc',
-    'jsregexp.cc', 'jump-target.cc', 'log.cc', 'log-utils.cc',
-    'mark-compact.cc', 'messages.cc', 'objects.cc', 'oprofile-agent.cc',
-    'parser.cc', 'property.cc', 'regexp-macro-assembler.cc',
-    'regexp-macro-assembler-irregexp.cc', 'regexp-stack.cc',
-    'register-allocator.cc', 'rewriter.cc', 'runtime.cc', 'scanner.cc',
-    'scopeinfo.cc', 'scopes.cc', 'serialize.cc', 'snapshot-common.cc',
-    'spaces.cc', 'string-stream.cc', 'stub-cache.cc', 'token.cc', 'top.cc',
+    'hashmap.cc', 'heap.cc', 'heap-profiler.cc', 'ic.cc',
+    'interpreter-irregexp.cc', 'jsregexp.cc', 'jump-target.cc',
+    'log.cc', 'log-utils.cc', 'mark-compact.cc', 'messages.cc',
+    'objects.cc', 'oprofile-agent.cc', 'parser.cc', 'property.cc',
+    'regexp-macro-assembler.cc', 'regexp-macro-assembler-irregexp.cc',
+    'regexp-stack.cc', 'register-allocator.cc', 'rewriter.cc',
+    'runtime.cc', 'scanner.cc', 'scopeinfo.cc', 'scopes.cc',
+    'serialize.cc', 'snapshot-common.cc', 'spaces.cc',
+    'string-stream.cc', 'stub-cache.cc', 'token.cc', 'top.cc',
     'unicode.cc', 'usage-analyzer.cc', 'utils.cc', 'v8-counters.cc',
     'v8.cc', 'v8threads.cc', 'variables.cc', 'version.cc',
     'virtual-frame.cc', 'zone.cc'
   ],
   'arch:arm': [
     'arm/assembler-arm.cc', 'arm/builtins-arm.cc', 'arm/cfg-arm.cc',
     'arm/codegen-arm.cc', 'arm/constants-arm.cc', 'arm/cpu-arm.cc',
     'arm/disasm-arm.cc', 'arm/debug-arm.cc', 'arm/frames-arm.cc',
     'arm/ic-arm.cc', 'arm/jump-target-arm.cc', 'arm/macro-assembler-arm.cc',
     'arm/regexp-macro-assembler-arm.cc',
@@ skipping 125 matching lines @@
     snapshot_obj = context.ConfigureObject(env, snapshot_cc, CPPPATH=['.'])
     libraries_obj = context.ConfigureObject(env, libraries_empty_src, CPPPATH=['.'])
   else:
     snapshot_obj = empty_snapshot_obj
   library_objs = [non_snapshot_files, libraries_obj, snapshot_obj]
   return (library_objs, d8_objs, [mksnapshot])
 
 
 (library_objs, d8_objs, mksnapshot) = ConfigureObjectFiles()
 Return('library_objs d8_objs mksnapshot')