Update gc branch to bleeding_edge revision 8862.

src/SConscript

Index: src/SConscript
diff --git a/src/SConscript b/src/SConscript
index c039f2d14ba36adb5c23ce4639120e8a2af6e42f..632e6575d1b7d7de24973a3be52f00ab014ec9ca 100755
--- a/src/SConscript
+++ b/src/SConscript
@@ -32,6 +32,7 @@ sys.path.append(join(root_dir, 'tools'))
 import js2c
 Import('context')
 Import('tools')
+Import('d8_env')
 
 
 SOURCES = {
@@ -65,6 +66,7 @@ SOURCES = {
     disassembler.cc
     diy-fp.cc
     dtoa.cc
+    elements.cc
     execution.cc
     factory.cc
     flags.cc
@@ -309,6 +311,7 @@ debug-debugger.js
 
 EXPERIMENTAL_LIBRARY_FILES = '''
 proxy.js
+weakmap.js
 '''.split()
 
 
@@ -340,7 +343,7 @@ def ConfigureObjectFiles():
   else:
     d8_files = context.GetRelevantSources(D8_FULL_FILES)
     d8_objs = [d8_js_obj]
-  d8_objs.append(context.ConfigureObject(env, [d8_files]))
+  d8_objs.append(context.ConfigureObject(d8_env, [d8_files]))
 
   # Combine the JavaScript library files into a single C++ file and
   # compile it.