[test] Skip slow tests

TBR=yangguo@chromium.org,ahaas@chromium.org
NOTRY=true

Change-Id: I1612d95a3782b23371b70d3a8fed600945988486
Reviewed-on: https://chromium-review.googlesource.com/489522Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44962}

test/debugger/debugger.status

@@ -73,6 +73,13 @@
   '*': [SKIP],
 }],  # variant == wasm_traps
 
+##############################################################################
+['arch == arm and not simulator_run', {
+  # Too slow on chromebooks.
+  'debug/ignition/debug-step-prefix-bytecodes': [SKIP],
+}],  # 'arch == arm and not simulator_run'
+
+##############################################################################
 ['arch == s390 or arch == s390x', {
 
   # Stack manipulations in LiveEdit is not implemented for this arch.

test/wasm-spec-tests/wasm-spec-tests.status

@@ -15,4 +15,9 @@
   'tests/skip-stack-guard-page': [PASS, ['arch == mipsel or arch == mips64el or arch == x64 or arch == ia32', SKIP]],
 }],  # ALWAYS
 
+['arch == arm and not simulator_run', {
+  # Too slow on chromebooks.
+  'tests/br_table': [SKIP],
+}],  # 'arch == arm and not simulator_run'
+
 ]