Debugger: fix deoptimizing inlined function.

BUG=v8:4320
LOG=N
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/1255803004

Cr-Commit-Position: refs/heads/master@{#29842}

src/debug.cc

@@ -1461,7 +1461,7 @@ bool Debug::PrepareFunctionForBreakPoints(Handle<SharedFunctionInfo> shared) {
         if (function->code()->kind() == Code::OPTIMIZED_FUNCTION) {
           Deoptimizer::DeoptimizeFunction(function);
         }
-        functions.Add(handle(function));
+        if (function->shared() == *shared) functions.Add(handle(function));
       } else if (include_generators && obj->IsJSGeneratorObject()) {
         JSGeneratorObject* generator_obj = JSGeneratorObject::cast(obj);
         if (!generator_obj->is_suspended()) continue;

test/mjsunit/regress/regress-4320.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --expose-debug-as debug
+
+var Debug = debug.Debug;
+
+function f() { g(); }
+
+function g() { }
+
+f();
+f();
+%OptimizeFunctionOnNextCall(f);
+f();
+
+Debug.setListener(function() {});
+Debug.setBreakPoint(g, 0);
+
+f();