[runtime] Remove unused %ToBool runtime function.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1277693004

Cr-Commit-Position: refs/heads/master@{#30085}

src/runtime/runtime-object.cc

@@ -1048,15 +1048,6 @@ RUNTIME_FUNCTION(Runtime_ToFastProperties) {
 }
 
 
-RUNTIME_FUNCTION(Runtime_ToBool) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_CHECKED(Object, object, 0);
-
-  return isolate->heap()->ToBoolean(object->BooleanValue());
-}
-
-
 RUNTIME_FUNCTION(Runtime_NewStringWrapper) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);

src/runtime/runtime.h

@@ -463,7 +463,6 @@ namespace internal {
   F(GetIndexedInterceptorElementNames, 1, 1)         \
   F(OwnKeys, 1, 1)                                   \
   F(ToFastProperties, 1, 1)                          \
-  F(ToBool, 1, 1)                                    \
   F(NewStringWrapper, 1, 1)                          \
   F(AllocateHeapNumber, 0, 1)                        \
   F(NewObject, 2, 1)                                 \

test/cctest/compiler/test-run-jscalls.cc

@@ -132,20 +132,6 @@ TEST(ConstructorCall) {
 
 
 // TODO(titzer): factor these out into test-runtime-calls.cc
-TEST(RuntimeCallCPP1) {
-  FLAG_allow_natives_syntax = true;
-  FunctionTester T("(function(a) { return %ToBool(a); })");
-
-  T.CheckCall(T.true_value(), T.Val(23), T.undefined());
-  T.CheckCall(T.true_value(), T.Val(4.2), T.undefined());
-  T.CheckCall(T.true_value(), T.Val("str"), T.undefined());
-  T.CheckCall(T.true_value(), T.true_value(), T.undefined());
-  T.CheckCall(T.false_value(), T.false_value(), T.undefined());
-  T.CheckCall(T.false_value(), T.undefined(), T.undefined());
-  T.CheckCall(T.false_value(), T.Val(0.0), T.undefined());
-}
-
-
 TEST(RuntimeCallCPP2) {
   FLAG_allow_natives_syntax = true;
   FunctionTester T("(function(a,b) { return %NumberAdd(a, b); })");