Clean out platform specific things from voice_engine_defines.h.

webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc

Index: webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc
diff --git a/webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc b/webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc
index d6dbf4b3d06cc5c34c41d38db1aa44a35dd73ba3..2e6c73311dca0701e32244734b20b3933617bec9 100644
--- a/webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc
+++ b/webrtc/voice_engine/test/auto_test/standard/dtmf_test.cc
@@ -44,7 +44,7 @@ TEST_F(DtmfTest, ManualCanChangeDtmfPayloadType) {
   // Start by modifying the receiving side.
   for (int i = 0; i < voe_codec_->NumOfCodecs(); i++) {
     EXPECT_EQ(0, voe_codec_->GetCodec(i, codec_instance));
-    if (!_stricmp("telephone-event", codec_instance.plname)) {
+    if (!STR_CASE_CMP("telephone-event", codec_instance.plname)) {
       codec_instance.pltype = 88;  // Use 88 instead of default 106.
       EXPECT_EQ(0, voe_base_->StopSend(channel_));
       EXPECT_EQ(0, voe_base_->StopPlayout(channel_));