Remove redundant this->

Change-Id: Id783201e802b6ce294fa92f4bbe492adfb446686
diff --git a/services/audioflinger/AudioMixer.cpp b/services/audioflinger/AudioMixer.cpp
index 78522fe..c295df5 100644
--- a/services/audioflinger/AudioMixer.cpp
+++ b/services/audioflinger/AudioMixer.cpp
@@ -58,7 +58,7 @@
 status_t AudioMixer::DownmixerBufferProvider::getNextBuffer(AudioBufferProvider::Buffer *pBuffer,
         int64_t pts) {
     //ALOGV("DownmixerBufferProvider::getNextBuffer()");
-    if (this->mTrackBufferProvider != NULL) {
+    if (mTrackBufferProvider != NULL) {
         status_t res = mTrackBufferProvider->getNextBuffer(pBuffer, pts);
         if (res == OK) {
             mDownmixConfig.inputCfg.buffer.frameCount = pBuffer->frameCount;
@@ -81,7 +81,7 @@
 
 void AudioMixer::DownmixerBufferProvider::releaseBuffer(AudioBufferProvider::Buffer *pBuffer) {
     //ALOGV("DownmixerBufferProvider::releaseBuffer()");
-    if (this->mTrackBufferProvider != NULL) {
+    if (mTrackBufferProvider != NULL) {
         mTrackBufferProvider->releaseBuffer(pBuffer);
     } else {
         ALOGE("DownmixerBufferProvider::releaseBuffer() error: NULL track buffer provider");