Unflake and speedup JsNative*Sample cpu profile tests

test/cctest/cctest.status

 # Copyright 2011 the V8 project authors. All rights reserved.
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 # modification, are permitted provided that the following conditions are
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@@ skipping 52 matching lines @@
   # This tests only that the preparser and parser agree, so there is no point in
   # running several variants. Note that this still takes ages, because there
   # are actually 13 * 38 * 5 * 128 = 316160 individual tests hidden here.
   'test-parsing/ParserSync': [PASS, NO_VARIANTS],
 
   # This tests only the type system, so there is no point in running several
   # variants.
   'test-hydrogen-types/*': [PASS, NO_VARIANTS],
   'test-types/*': [PASS, NO_VARIANTS],
 
-  # The cpu profiler tests are notoriously flaky.
-  # BUG(2999). (test/cpu-profiler/CollectCpuProfile)
-  # BUG(3287). (test-cpu-profiler/SampleWhenFrameIsNotSetup)
-  'test-cpu-profiler/*': [PASS, FLAKY],
-
   ############################################################################
   # Slow tests.
   'test-api/Threading1': [PASS, ['mode == debug', SLOW]],
   'test-api/Threading2': [PASS, ['mode == debug', SLOW]],
   'test-api/Threading3': [PASS, ['mode == debug', SLOW]],
   'test-api/Threading4': [PASS, ['mode == debug', SLOW]],
   'test-strings/StringOOM*': [PASS, ['mode == debug', SKIP]],
 }],  # ALWAYS
 
 ##############################################################################
@@ skipping 264 matching lines @@
   'test-api/Float32Array' : [SKIP],
   'test-api/Float64Array' : [SKIP],
   'test-api/Regress2333' : [SKIP],
   'test-alloc/StressHandles' : [SKIP],
   'test-alloc/StressJS' : [SKIP],
   'test-accessors/HandleScopePop' : [SKIP],
   'test-accessors/Gc' : [SKIP],
 
 }],  # 'arch == nacl_ia32 or arch == nacl_x64'
 ]