Remove duplicate CPU detection code; use base::CPU instead.

media/base/cpu_features_x86.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Code in this file is taked from
-// third_party/skia/src/opts/opts_check_SSE2.cpp.
-
-// Note that this file cannot be compiled with -msse2 in gcc.
-
-#include "build/build_config.h"
-#include "media/base/cpu_features.h"
-
-namespace media {
-
-#ifdef _MSC_VER
-static inline void getcpuid(int info_type, int info[4]) {
-  __asm {
-    mov    eax, [info_type]
-        cpuid
-        mov    edi, [info]
-        mov    [edi], eax
-        mov    [edi+4], ebx
-        mov    [edi+8], ecx
-        mov    [edi+12], edx
-        }
-}
-#else
-static inline void getcpuid(int info_type, int info[4]) {
-  // We save and restore ebx, so this code can be compatible with -fPIC
-#if defined(__i386__)
-  asm volatile (
-        "pushl %%ebx      \n\t"
-        "cpuid            \n\t"
-        "movl %%ebx, %1   \n\t"
-        "popl %%ebx       \n\t"
-        : "=a"(info[0]), "=r"(info[1]), "=c"(info[2]), "=d"(info[3])
-        : "a"(info_type)
-                );
-#else
-  // We can use cpuid instruction without pushing ebx on gcc x86-64 because it
-  // does not use ebx (or rbx) as a GOT register.
-  asm volatile (
-      "cpuid            \n\t"
-      : "=a"(info[0]), "=r"(info[1]), "=c"(info[2]), "=d"(info[3])
-      : "a"(info_type)
-      : "%rbx"
-  );
-#endif
-}
-#endif
-
-bool hasMMX() {
-#if defined(ARCH_CPU_X86_64)
-  // Every X86_64 processor has MMX.
-  return true;
-#else
-  int cpu_info[4] = { 0 };
-  getcpuid(1, cpu_info);
-  return (cpu_info[3] & (1<<23)) != 0;
-#endif
-}
-
-bool hasSSE() {
-#if defined(ARCH_CPU_X86_64)
-  // Every X86_64 processor has SSE.
-  return true;
-#else
-  int cpu_info[4] = { 0 };
-  getcpuid(1, cpu_info);
-  return (cpu_info[3] & (1<<25)) != 0;
-#endif
-}
-
-bool hasSSE2() {
-#if defined(ARCH_CPU_X86_64)
-  // All X86_64 machines have SSE2, so don't even bother checking.
-  return true;
-#else
-  int cpu_info[4] = { 0 };
-  getcpuid(1, cpu_info);
-  return (cpu_info[3] & (1<<26)) != 0;
-#endif
-}
-
-bool hasSSSE3() {
-  int cpu_info[4] = { 0 };
-  getcpuid(1, cpu_info);
-  return (cpu_info[3] & 0x04000000) != 0 && (cpu_info[2] & 0x00000001) != 0 &&
-      (cpu_info[2] & 0x00000200) != 0;
-}
-
-}  // namespace media