Replace assert() with static_assert() if the condition is evaluatable at
compile time.

The condition of static_assert() is evaluated at compile time which is safer and
more efficient.

Note that static_assert() requires C++11.

The changes were generated by the misc-static-assert ClangTidy check by alexfh@google.com

R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/51019004

Cr-Commit-Position: refs/heads/master@{#9231}
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index e8210c9..aed6341 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -791,7 +791,7 @@
 int AudioProcessingImpl::StartDebugRecording(
     const char filename[AudioProcessing::kMaxFilenameSize]) {
   CriticalSectionScoped crit_scoped(crit_);
-  assert(kMaxFilenameSize == FileWrapper::kMaxFileNameSize);
+  static_assert(kMaxFilenameSize == FileWrapper::kMaxFileNameSize, "");
 
   if (filename == NULL) {
     return kNullPointerError;