[debugger, interpreter] add break location at if-statement.

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 486 matching lines @@
   'test-api/Threading2': [PASS, SLOW],
   'test-api/ExternalArrays': [PASS, SLOW],
 
 }],  # 'arch == ppc64 and simulator_run == True'
 
 ##############################################################################
 ['ignition == True', {
   # TODO(yangguo,4690): Test failures in debugger tests.
   'test-debug/DebugStepKeyedLoadLoop': [FAIL],
   'test-debug/DebugStepKeyedStoreLoop': [FAIL],
-  'test-debug/DebugStepIf': [FAIL],
   'test-debug/DebugStepNamedLoadLoop': [FAIL],
   'test-debug/BreakPointConstructCallWithGC': [PASS, FAIL],
   'test-debug/DebugStepNamedStoreLoop': [FAIL],
   'test-debug/DebugStepSwitch': [FAIL],
   'test-debug/DebugStepWhile': [FAIL],
   'test-debug/DebugStepFor': [FAIL],
   'test-debug/DebugStepForContinue': [FAIL],
   'test-debug/DebugStepForIn': [FAIL],
   'test-debug/DebugStepDoWhile': [FAIL],
   'test-debug/DebugConditional': [FAIL],
   'test-debug/DebugStepForBreak': [FAIL],
   'test-debug/DebugStepWith': [FAIL],
-  'test-debug/DebugStepFunctionApply': [FAIL],
-  'test-debug/StepInOutBranch': [FAIL],
-  'test-debug/DebugStepFunctionCall': [FAIL],
 
   # TODO(rmcilroy,4680): Check failed: toplevel_test_code_event_found.
   'test-serialize/SerializeToplevelIsolates': [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],
@@ skipping 27 matching lines @@
   '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-serialize/SerializeInternalReference': [FAIL, ['arch == arm or arch == arm64', PASS]],
 }],  # ignition == True
 
 ]