[builtins] Provide Math.floor as TurboFan builtin.

src/counters.h

 // Copyright 2012 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.
 
 #ifndef V8_COUNTERS_H_
 #define V8_COUNTERS_H_
 
 #include "include/v8.h"
 #include "src/allocation.h"
 #include "src/base/platform/elapsed-timer.h"
@@ skipping 741 matching lines @@
   SC(sub_string_native, V8.SubStringNative)                                    \
   SC(string_compare_native, V8.StringCompareNative)                            \
   SC(string_compare_runtime, V8.StringCompareRuntime)                          \
   SC(regexp_entry_runtime, V8.RegExpEntryRuntime)                              \
   SC(regexp_entry_native, V8.RegExpEntryNative)                                \
   SC(number_to_string_native, V8.NumberToStringNative)                         \
   SC(number_to_string_runtime, V8.NumberToStringRuntime)                       \
   SC(math_atan2_runtime, V8.MathAtan2Runtime)                                  \
   SC(math_clz32_runtime, V8.MathClz32Runtime)                                  \
   SC(math_exp_runtime, V8.MathExpRuntime)                                      \
-  SC(math_floor_runtime, V8.MathFloorRuntime)                                  \
   SC(math_log_runtime, V8.MathLogRuntime)                                      \
   SC(math_pow_runtime, V8.MathPowRuntime)                                      \
   SC(math_round_runtime, V8.MathRoundRuntime)                                  \
   SC(math_sqrt_runtime, V8.MathSqrtRuntime)                                    \
   SC(stack_interrupts, V8.StackInterrupts)                                     \
   SC(runtime_profiler_ticks, V8.RuntimeProfilerTicks)                          \
   SC(runtime_calls, V8.RuntimeCalls)                          \
   SC(bounds_checks_eliminated, V8.BoundsChecksEliminated)                      \
   SC(bounds_checks_hoisted, V8.BoundsChecksHoisted)                            \
   SC(soft_deopts_requested, V8.SoftDeoptsRequested)                            \
@@ skipping 204 matching lines @@
 
   explicit Counters(Isolate* isolate);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Counters);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COUNTERS_H_