Remove the cpu-count forwarding passing code from the v8 SConscript.

build/SConscript.v8

 # Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 
 Import('env')
 
 if not env.Dir('$CHROME_SRC_DIR/v8').exists():
   Return()
 
-# Grab the -j flag from the outer environment, if available.
-try:
-  cpus = env.GetOption('num_jobs')
-  cpu_flag = ' -j%d' % cpus
-except AttributeError:
-  cpu_flag = ''
-
 # The v8 build script wants a 'debug'/'release' string to tell it whether
 # to build optimized.  Convert our build flags into that form.
 mode = 'release'
 if env['TARGET_DEBUG']:
   mode = 'debug'
 
 env = env.Clone(
     V8_MODE = mode,
     V8_MODE_DIR = '$V8_DIR/obj/$V8_MODE',
     V8_SCONS_COM = '$PYTHON $SCONS $SCONSFLAGS mode=$V8_MODE',
-    SCONS='$CHROME_SRC_DIR/third_party/scons/scons.py',
+    SCONS = '$CHROME_SRC_DIR/third_party/scons/scons.py',
     SCONSFLAGS = ('-Q '
                   '-C $OBJ_ROOT/v8 '
                   '-Y $CHROME_SRC_DIR/v8 '
                   '--warn=no-deprecated '
-                  '--warn=no-no-parallel-support' + cpu_flag),
+                  '--warn=no-no-parallel-support'),
 )
 
 # Rather than build v8 with our own commands, we just shell out to v8's
 # own SCons-based build, since their build system is complicated.
 # This SConscript just declares dependencies on the outputs of that build.
 #
 # Arrange to make sure the build directory exists, since the subsidiary
 # SCons we invoke will chdir there of its own accord.
 
 if not os.path.exists(env.Dir('$OBJ_ROOT/v8').abspath):
@@ skipping 41 matching lines @@
 env.Install('$V8_DIR', '$V8_MODE_DIR/snapshot-empty${OBJSUFFIX}')
 
 # To satisfy tests expecting the following .exe name.
 if env['PLATFORM'] == 'win32':
   # TODO(evanm): this may be necessary on other platforms(?)
   i = env.InstallAs('$TARGET_ROOT/v8_shell_sample${PROGSUFFIX}', v8[0])
 
 env.ChromeStaticLibrary('v8_snapshot',
                         ['$V8_MODE_DIR/libraries-empty${OBJSUFFIX}',
                          '$V8_MODE_DIR/snapshot${OBJSUFFIX}'])