Added option to specify a maximum file size when recording an AEC dump.

talk/media/base/fakemediaengine.h

Index: talk/media/base/fakemediaengine.h
diff --git a/talk/media/base/fakemediaengine.h b/talk/media/base/fakemediaengine.h
index 5a4f46a20464c02ba14acc766fe923f44f3d35c1..b990c15ad22979ac7c66436f3ede84df3ee52390 100644
--- a/talk/media/base/fakemediaengine.h
+++ b/talk/media/base/fakemediaengine.h
@@ -783,7 +783,9 @@ class FakeVoiceEngine : public FakeBaseEngine {
 
   int GetInputLevel() { return 0; }
 
-  bool StartAecDump(rtc::PlatformFile file) { return false; }
+  bool StartAecDump(rtc::PlatformFile file, int64_t max_size_bytes) {
+    return false;
+  }
 
   bool StartRtcEventLog(rtc::PlatformFile file) { return false; }