[Interpreter] Adds support for const/let variables to interpreter.

test/cctest/cctest.status

 # Copyright 2011 the V8 project authors. All rights reserved.
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@@ skipping 558 matching lines @@
 
   # TODO(rmcilroy,4680): Strong mode failures.
   'test-parsing/StrongModeFreeVariablesDeclaredByLanguage': [FAIL],
   'test-parsing/StrongModeFreeVariablesDeclaredInGlobalPrototype': [FAIL],
   'test-parsing/StrongModeFreeVariablesDeclaredByPreviousScript': [FAIL],
   'test-api/StrongModeAccessCheckBlocked': [FAIL],
   'test-api/AccessorShouldThrowOnError': [FAIL],
   'test-api/InterceptorShouldThrowOnError': [FAIL],
   'test-api/StrongModeAccessCheckAllowed': [FAIL],
 
-  # TODO(rmcilroy,4680): FunctionTester SameValue check fails.
-  'test-run-variables/StackInitializeVariables': [FAIL],
-  'test-run-variables/ContextInitializeVariables': [FAIL],
-  'test-run-variables/ContextStoreVariables': [FAIL],
-  'test-run-variables/StackStoreVariables': [FAIL],
-  'test-run-variables/ContextLoadVariables': [FAIL],
-  'test-run-variables/StackLoadVariables': [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],
 
   # TODO(rmcilroy,4680): Check failed: fun1->IsOptimized() || !CcTest::i_isolate()->use_crankshaft().
@@ skipping 38 matching lines @@
   'test-api/TryCatchSourceInfo': [FAIL],
   'test-api/SetJitCodeEventHandler': [FAIL],
   'test-heap/WeakFunctionInConstructor': [FAIL],
   'test-heap/Regress169209': [FAIL],
   'test-heap/IncrementalMarkingClearsMonomorphicConstructor': [FAIL],
   'test-heap/IncrementalMarkingPreservesMonomorphicConstructor': [FAIL],
   'test-heap/IncrementalMarkingPreservesMonomorphicCallIC': [FAIL],
   'test-heap/CompilationCacheCachingBehavior': [FAIL],
   'test-heap/CellsInOptimizedCodeAreWeak': [FAIL],
   'test-run-inlining/InlineTwice': [FAIL],
-  'test-decls/Regress425510': [FAIL],
 
   # TODO(rmcilroy,4680): Fail on some bot configurations.
   'test-heap/CanonicalSharedFunctionInfo': [PASS, FAIL],
   'test-heap/TestCodeFlushingIncrementalAbort': [PASS, FAIL],
   'test-cpu-profiler/SourceLocation': [PASS, FAIL],
   'test-run-jsexceptions/DeoptFinallyReturn': [PASS, FAIL],
   'test-serialize/SerializeInternalReference': [PASS, FAIL],
 
   # TODO(rmcilroy,4680): Test crashes.
   'test-serialize/PerIsolateSnapshotBlobs': [SKIP],
@@ skipping 60 matching lines @@
   'test-serialize/SerializeInternalReference': [PASS, FAIL],
   'test-spaces/SizeOfFirstPageIsLargeEnough': [PASS, FAIL],
   'test-api/InitializeDefaultIsolateOnSecondaryThread1': [PASS, FAIL],
   'test-heap/Regress538257': [PASS, FAIL],
   'test-heap/AddInstructionChangesNewSpacePromotion': [PASS, FAIL],
   'test-decls/CrossScriptReferencesHarmony': [PASS, FAIL],
   'test-lockers/IsolateNestedLocking': [PASS, FAIL],
 }],  # ignition == True and arch == arm64
 
 ]