[Isolates] Merge crankshaft (r5922 from bleeding_edge).

SConstruct

 # Copyright 2010 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 505 matching lines @@
       'LINKFLAGS':    ['-m32']
     },
     'simulator:mips': {
       'CCFLAGS':      ['-m32'],
       'LINKFLAGS':    ['-m32']
     },
     'mode:release': {
       'CCFLAGS':      ['-O2']
     },
     'mode:debug': {
-      'CCFLAGS':      ['-g', '-O0']
+      'CCFLAGS':      ['-g', '-O0'],
+      'CPPDEFINES':   ['DEBUG']
     },
     'prof:oprofile': {
       'LIBPATH': ['/usr/lib32', '/usr/lib32/oprofile'],
       'LIBS': ['opagent']
     }
   },
   'msvc': {
     'all': {
       'LIBS': ['winmm', 'ws2_32']
     },
@@ skipping 34 matching lines @@
     },
     'arch:ia32': {
       'CPPDEFINES': ['V8_TARGET_ARCH_IA32'],
       'LINKFLAGS': ['/MACHINE:X86']
     },
     'arch:x64': {
       'CPPDEFINES': ['V8_TARGET_ARCH_X64'],
       'LINKFLAGS': ['/MACHINE:X64', '/STACK:2091752']
     },
     'mode:debug': {
-      'CCFLAGS':   ['/Od'],
-      'LINKFLAGS': ['/DEBUG'],
+      'CCFLAGS':    ['/Od'],
+      'LINKFLAGS':  ['/DEBUG'],
+      'CPPDEFINES': ['DEBUG'],
       'msvcrt:static': {
-        'CCFLAGS': ['/MTd']
+        'CCFLAGS':  ['/MTd']
       },
       'msvcrt:shared': {
-        'CCFLAGS': ['/MDd']
+        'CCFLAGS':  ['/MDd']
       }
     }
   }
 }
 
 
 D8_FLAGS = {
   'gcc': {
     'console:readline': {
       'LIBS': ['readline']
@@ skipping 548 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()