Remove COMPILE_ASSERT and use static_assert everywhere

COMPILE_ASSERT is no longer needed now that we have C++11's
static_assert.

R=aluebs@webrtc.org, andrew@webrtc.org, hellner@chromium.org, henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/39469004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@8058 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index 92e63f1..5d7de3a 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -12,7 +12,6 @@
 
 #include <assert.h>
 
-#include "webrtc/base/compile_assert.h"
 #include "webrtc/base/platform_file.h"
 #include "webrtc/common_audio/include/audio_util.h"
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
@@ -55,7 +54,7 @@
 namespace webrtc {
 
 // Throughout webrtc, it's assumed that success is represented by zero.
-COMPILE_ASSERT(AudioProcessing::kNoError == 0, no_error_must_be_zero);
+static_assert(AudioProcessing::kNoError == 0, "kNoError must be zero");
 
 // This class has two main functionalities:
 //