Set GTEST_DEATH_TEST_USE_FORK environment variable to make death tests valgri...

tools/valgrind/valgrind.sh

 #!/bin/bash
 
 # Copyright (c) 2009 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.
 
 # This is a small script for manually launching valgrind, along with passing
 # it the suppression file, and some helpful arguments (automatically attaching
 # the debugger on failures, etc).  Run it from your repo root, something like:
 #  $ sh ./tools/valgrind/valgrind.sh ./sconsbuild/Debug/chrome
@@ skipping 79 matching lines @@
 fi
 
 set -x
 
 # G_SLICE=always-malloc: make glib use system malloc
 # NSS_DISABLE_ARENA_FREE_LIST=1: make nss use system malloc
 # G_DEBUG=fatal_warnings: make  GTK abort on any critical or warning assertions.
 # If it crashes on you in the Options menu, you hit bug 19751,
 # comment out the G_DEBUG=fatal_warnings line.
 #
-# --smc-check=all: handle v8's dynamic code generation.
-# (though we can probably remove that now that v8 is annotated).
-# --trace-children to follow into the renderer processes.
+# GTEST_DEATH_TEST_USE_FORK=1: make gtest death tests valgrind-friendly
 #
 # When everyone has the latest valgrind, we might want to add
 #  --show-possible=no
 # to ignore possible but not definite leaks.
 
 G_SLICE=always-malloc \
 NSS_DISABLE_ARENA_FREE_LIST=1 \
 G_DEBUG=fatal_warnings \
+GTEST_DEATH_TEST_USE_FORK=1 \
 valgrind \
   --tool=$TOOL_NAME \
   --trace-children=yes \
   --suppressions="$SUPPRESSIONS" \
-  --smc-check=all \
   "${DEFAULT_TOOL_FLAGS[@]}" \
   "$@"