Revert of [gn] Fix valgrind config (patchset #1 id:1 of...

Revert of [gn] Fix valgrind config (patchset #1 id:1 of https://codereview.chromium.org/2109403002/ )

Reason for revert:
Breaks...

Original issue's description:
> [gn] Fix valgrind config
>
> BUG=chromium:474921
> NOTRY=true
> NOTREECHECKS=true
> TBR=vogelheim@chromium.org, jochen@chromium.org
>
> Committed: https://crrev.com/e97c990a2b1fd0b5b90832a7f182daa25fee8291
> Cr-Commit-Position: refs/heads/master@{#37418}

TBR=vogelheim@chromium.org,jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:474921

Review-Url: https://codereview.chromium.org/2109423002
Cr-Commit-Position: refs/heads/master@{#37419}

BUILD.gn

@@ -44,10 +44,6 @@ declare_args() {
   # Enable slow dchecks.
   v8_enable_slow_dchecks = false
 
-  # Indicate if valgrind was fetched as a custom deps to make it available on
-  # swarming.
-  v8_has_valgrind = false
-
   # Interpreted regexp engine exists as platform-independent alternative
   # based where the regular expression is compiled to a bytecode.
   v8_interpreted_regexp = false

gni/isolate.gni

@@ -101,11 +101,6 @@ template("v8_isolate_run") {
       } else {
         use_snapshot = "false"
       }
-      if (v8_has_valgrind) {
-        has_valgrind = "1"
-      } else {
-        has_valgrind = "0"
-      }
 
       # Note, all paths will be rebased in isolate_driver.py to be relative to
       # the isolate file.
@@ -137,7 +132,7 @@ template("v8_isolate_run") {
         "--config-variable",
         "gcmole=0",
         "--config-variable",
-        "has_valgrind=$has_valgrind",
+        "has_valgrind=0",
         "--config-variable",
         "icu_use_data_file_flag=$icu_use_data_file_flag",
         "--config-variable",

infra/mb/mb_config.pyl

@@ -544,7 +544,8 @@
     },
 
     'valgrind': {
-      'gn_args': 'v8_has_valgrind=true',
+      # TODO(machenbach): Add this to gn.
+      'gn_args': 'has_valgrind=true',
       'gyp_defines': 'has_valgrind=1',
     },