Remove NaCl support.

src/base/cpu.cc

Index: src/base/cpu.cc
diff --git a/src/base/cpu.cc b/src/base/cpu.cc
index 16eb7c9a85a6645dd2b5e2e7b67923ebd9bcf75e..775719292065716e86ac758e26e27e7e51b36735 100644
--- a/src/base/cpu.cc
+++ b/src/base/cpu.cc
@@ -44,9 +44,7 @@
 namespace v8 {
 namespace base {
 
-#if defined(__pnacl__)
-// Portable host shouldn't do feature detection.
-#elif V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64
+#if V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64
 
 // Define __cpuid() for non-MSVC libraries.
 #if !V8_LIBC_MSVCRT
@@ -341,11 +339,7 @@ CPU::CPU()
       is_fp64_mode_(false),
       has_non_stop_time_stamp_counter_(false) {
   memcpy(vendor_, "Unknown", 8);
-#if V8_OS_NACL
-// Portable host shouldn't do feature detection.
-// TODO(jfb): Remove the hardcoded ARM simulator flags in the build, and
-// hardcode them here instead.
-#elif V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64
+#if V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64
   int cpu_info[4];
 
   // __cpuid with an InfoType argument of 0 returns the number of