Deleted OS_WIN and all Windows specific files from base.

base/cpu_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "base/cpu.h"
 #include "build/build_config.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 // Tests whether we can run extended instructions represented by the CPU
 // information. This test actually executes some extended instructions (such as
 // MMX, SSE, etc.) supported by the CPU and sees we can run them without
 // "undefined instruction" exceptions. That is, this test succeeds when this
 // test finishes without a crash.
 TEST(CPU, RunExtendedInstructions) {
 #if defined(ARCH_CPU_X86_FAMILY)
   // Retrieve the CPU information.
   base::CPU cpu;
 
-// TODO(jschuh): crbug.com/168866 Find a way to enable this on Win64.
-#if defined(OS_WIN) && !defined(_M_X64)
+#if defined(OS_POSIX) && defined(__x86_64__)
   ASSERT_TRUE(cpu.has_mmx());
 
   // Execute an MMX instruction.
-  __asm emms;
-
-  if (cpu.has_sse()) {
-    // Execute an SSE instruction.
-    __asm xorps xmm0, xmm0;
-  }
-
-  if (cpu.has_sse2()) {
-    // Execute an SSE 2 instruction.
-    __asm psrldq xmm0, 0;
-  }
-
-  if (cpu.has_sse3()) {
-    // Execute an SSE 3 instruction.
-    __asm addsubpd xmm0, xmm0;
-  }
-
-  if (cpu.has_ssse3()) {
-    // Execute a Supplimental SSE 3 instruction.
-    __asm psignb xmm0, xmm0;
-  }
-
-  if (cpu.has_sse41()) {
-    // Execute an SSE 4.1 instruction.
-    __asm pmuldq xmm0, xmm0;
-  }
-
-  if (cpu.has_sse42()) {
-    // Execute an SSE 4.2 instruction.
-    __asm crc32 eax, eax;
-  }
-#elif defined(OS_POSIX) && defined(__x86_64__)
-  ASSERT_TRUE(cpu.has_mmx());
-
-  // Execute an MMX instruction.
   __asm__ __volatile__("emms\n" : : : "mm0");
 
   if (cpu.has_sse()) {
     // Execute an SSE instruction.
     __asm__ __volatile__("xorps %%xmm0, %%xmm0\n" : : : "xmm0");
   }
 
   if (cpu.has_sse2()) {
     // Execute an SSE 2 instruction.
     __asm__ __volatile__("psrldq $0, %%xmm0\n" : : : "xmm0");
@@ skipping 14 matching lines @@
     __asm__ __volatile__("pmuldq %%xmm0, %%xmm0\n" : : : "xmm0");
   }
 
   if (cpu.has_sse42()) {
     // Execute an SSE 4.2 instruction.
     __asm__ __volatile__("crc32 %%eax, %%eax\n" : : : "eax");
   }
 #endif
 #endif
 }