ifdef around mips detect code

BUG=none
TEST=build on x86 linux
Review URL: https://webrtc-codereview.appspot.com/889005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@421 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

@@ -1,6 +1,6 @@
 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 420
+Version: 421
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 420
+#define LIBYUV_VERSION 421
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/cpu_id.cc

@@ -118,6 +118,7 @@ int ArmCpuCaps(const char* cpuinfo_name) {
   return 0;
 }
 
+#if defined(__mips__) && defined(__linux__)
 static int MipsCpuCaps(const char* search_string) {
   const char* file_name = "/proc/cpuinfo";
   char cpuinfo_line[256];
@@ -134,6 +135,7 @@ static int MipsCpuCaps(const char* search_string) {
   /* Did not find string in the proc file, or not Linux ELF. */
   return 0;
 }
+#endif
 
 // CPU detect function for SIMD instruction sets.
 // TODO(fbarchard): Use constant if/when valgrind says cpu_info is initialized.

unit_test/rotate_test.cc

@@ -1640,4 +1640,5 @@ TEST_F(libyuvTest, NV12ToI420SplitUV) {
 
   EXPECT_EQ(0, err);
 }
+
 }  // namespace libyuv