[compiler] Sidestep the interpreter for generator functions.

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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 #
 #     * Redistributions of source code must retain the above copyright
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@@ skipping 510 matching lines @@
   'test-debug/DebugStepForContinue': [FAIL],
   'test-debug/DebugStepKeyedStoreLoop': [FAIL],
   'test-debug/DebugStepForBreak': [FAIL],
   'test-debug/DebugStepKeyedLoadLoop': [FAIL],
   'test-debug/DebugStepNamedStoreLoop': [FAIL],
 
   # BUG(4333). Function name inferrer does not work for ES6 clases.
   'test-func-name-inference/UpperCaseClass': [TIMEOUT],
   'test-func-name-inference/LowerCaseClass': [TIMEOUT],
 
-  # TODO(rmcilroy,4681): Requires support for generators.
-  'test-inobject-slack-tracking/JSGeneratorObjectBasic': [FAIL],
-  'test-inobject-slack-tracking/JSGeneratorObjectBasicNoInlineNew': [FAIL],
-  'test-api/IsGeneratorFunctionOrObject': [FAIL],
-
   # TODO(rmcilroy,4680): The function_data field should be a BytecodeArray on interpreter entry
   'test-api/SetFunctionEntryHook': [FAIL],
 
   # TODO(rmcilroy,4680): Check failed: !function->shared()->is_compiled() || function->IsOptimized().
   'test-heap/TestCodeFlushingPreAged': [FAIL],
   'test-heap/TestCodeFlushingIncrementalScavenge': [FAIL],
   'test-heap/TestCodeFlushing': [FAIL],
   'test-heap/TestCodeFlushingIncremental': [FAIL],
   'test-heap/TestCodeFlushingIncrementalAbort': [PASS, ['mode == debug or dcheck_always_on == True', FAIL]],
 
@@ skipping 15 matching lines @@
   'test-heap/IncrementalMarkingPreservesMonomorphicConstructor': [FAIL],
   'test-heap/IncrementalMarkingPreservesMonomorphicCallIC': [FAIL],
   'test-heap/CompilationCacheCachingBehavior': [FAIL],
   'test-heap/CellsInOptimizedCodeAreWeak': [FAIL],
   'test-run-inlining/InlineTwice': [FAIL],
   'test-serialize/SerializeInternalReference': [FAIL, ['arch == arm or arch == arm64', PASS]],
 
 }],  # ignition == True
 
 ]