Remove leaking aecdump testfiles.

Also removes tracing to file in ApmTest because it leads to remaining
files.

BUG=4258
R=bjornv@webrtc.org, kjellander@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/52469004

Cr-Commit-Position: refs/heads/master@{#9175}
diff --git a/webrtc/modules/audio_processing/test/audio_processing_unittest.cc b/webrtc/modules/audio_processing/test/audio_processing_unittest.cc
index e5c3865..892927f 100644
--- a/webrtc/modules/audio_processing/test/audio_processing_unittest.cc
+++ b/webrtc/modules/audio_processing/test/audio_processing_unittest.cc
@@ -324,9 +324,6 @@
 
   static void SetUpTestCase() {
     Trace::CreateTrace();
-    std::string trace_filename =
-        test::TempFilename(test::OutputPath(), "audioproc_trace");
-    ASSERT_EQ(0, Trace::SetTraceFile(trace_filename.c_str()));
   }
 
   static void TearDownTestCase() {
@@ -1745,6 +1742,8 @@
   EXPECT_NE(0, feof(out_file));
   ASSERT_EQ(0, fclose(ref_file));
   ASSERT_EQ(0, fclose(out_file));
+  remove(ref_filename.c_str());
+  remove(out_filename.c_str());
 }
 
 TEST_F(ApmTest, VerifyDebugDumpInt) {