Revert of Skip slow tests in non debug too (patchset #1 id:1 of...

Revert of Skip slow tests in non debug too (patchset #1 id:1 of https://codereview.chromium.org/1184923003/)

Reason for revert:
[Sheriff] Needed for reverting:
https://codereview.chromium.org/1175313003

Original issue's description:
> Skip slow tests in non debug too
>
> BUG=N
> LOG=N
> TBR=adamk
>
> Committed: https://crrev.com/17b0f16c760e5b0d51ae87742a864de93b6f4c0b
> Cr-Commit-Position: refs/heads/master@{#29058}

TBR=adamk@chromium.org,arv@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=N

Review URL: https://codereview.chromium.org/1177223004

Cr-Commit-Position: refs/heads/master@{#29066}

test/test262-es6/test262-es6.status

@@ -598,20 +598,19 @@
 
   ############################ SKIPPED TESTS #############################
 
-  # These tests take a looong time to run.
-  'built-ins/decodeURI/S15.1.3.1_A1.10_T1': [SKIP],
-  'built-ins/decodeURI/S15.1.3.1_A1.11_T1': [SKIP],
-  'built-ins/decodeURI/S15.1.3.1_A1.11_T2': [SKIP],
-  'built-ins/decodeURI/S15.1.3.1_A1.12_T1': [SKIP],
-  'built-ins/decodeURI/S15.1.3.1_A1.12_T2': [SKIP],
-  'built-ins/decodeURIComponent/S15.1.3.2_A1.11_T1': [SKIP],
-  'built-ins/decodeURIComponent/S15.1.3.2_A1.12_T1': [SKIP],
-  'built-ins/RegExp/S15.10.2.12_A3_T1': [SKIP],
-  'intl402/9.2.6_4_b': [SKIP],
-  'language/literals/regexp/S7.8.5_A1.1_T2': [SKIP],
-  'language/literals/regexp/S7.8.5_A1.4_T2': [SKIP],
-  'language/literals/regexp/S7.8.5_A2.1_T2': [SKIP],
-  'language/literals/regexp/S7.8.5_A2.4_T2': [SKIP],
+  # These tests take a looong time to run in debug mode.
+  'built-ins/decodeURI/S15.1.3.1_A1.11_T1': [PASS, ['mode == debug', SKIP]],
+  'built-ins/decodeURI/S15.1.3.1_A1.11_T2': [PASS, ['mode == debug', SKIP]],
+  'built-ins/decodeURI/S15.1.3.1_A1.12_T1': [PASS, ['mode == debug', SKIP]],
+  'built-ins/decodeURI/S15.1.3.1_A1.12_T2': [PASS, ['mode == debug', SKIP]],
+  'built-ins/decodeURI/S15.1.3.1_A2.5_T1': [PASS, ['mode == debug', SKIP]],
+  'built-ins/decodeURIComponent/S15.1.3.2_A2.5_T1': [PASS, ['mode == debug', SKIP]],
+  'built-ins/RegExp/S15.10.2.12_A3_T1': [PASS, ['mode == debug', SKIP]],
+  'intl402/9.2.6_4_b': [PASS, ['mode == debug', SKIP]],
+  'language/literals/regexp/S7.8.5_A1.1_T2': [PASS, ['mode == debug', SKIP]],
+  'language/literals/regexp/S7.8.5_A1.4_T2': [PASS, ['mode == debug', SKIP]],
+  'language/literals/regexp/S7.8.5_A2.1_T2': [PASS, ['mode == debug', SKIP]],
+  'language/literals/regexp/S7.8.5_A2.4_T2': [PASS, ['mode == debug', SKIP]],
   'language/statements/const/syntax/const-invalid-assignment-next-expression-for': [PASS, ['mode == debug', SKIP], ['sloppy', SKIP]],
 }],  # ALWAYS