Implement writing mic audio input data to file for debugging purposes.

content/public/test/mock_render_process_host.cc

Index: content/public/test/mock_render_process_host.cc
diff --git a/content/public/test/mock_render_process_host.cc b/content/public/test/mock_render_process_host.cc
index cae7b7e59150528dede9042af5e7f8231d7a5c68..954038fd4c45ee5413f4a58b1debd2cce38db6b6 100644
--- a/content/public/test/mock_render_process_host.cc
+++ b/content/public/test/mock_render_process_host.cc
@@ -287,10 +287,11 @@ void MockRenderProcessHost::FilterURL(bool empty_allowed, GURL* url) {
 }
 
 #if defined(ENABLE_WEBRTC)
-void MockRenderProcessHost::EnableAecDump(const base::FilePath& file) {
+void MockRenderProcessHost::EnableAudioDebugRecordings(
+    const base::FilePath& file) {
 }
 
-void MockRenderProcessHost::DisableAecDump() {
+void MockRenderProcessHost::DisableAudioDebugRecordings() {
 }
 
 void MockRenderProcessHost::SetWebRtcLogMessageCallback(