Fix a crash in WebRtcRtpDumpHandler.

chrome/browser/media/webrtc_rtp_dump_handler_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
@@ skipping 61 matching lines @@
 
     scoped_ptr<WebRtcRtpDumpWriter> writer(new FakeDumpWriter(
         10,
         base::Bind(&WebRtcRtpDumpHandler::OnMaxDumpSizeReached,
                    base::Unretained(handler_.get())),
         end_dump_success));
 
     handler_->SetDumpWriterForTesting(writer.Pass());
   }
 
+  void DeleteDumpHandler() { handler_.reset(); }
+
   void WriteFakeDumpFiles(const base::FilePath& dir,
                           base::FilePath* incoming_dump,
                           base::FilePath* outgoing_dump) {
     *incoming_dump = dir.AppendASCII("recv");
     *outgoing_dump = dir.AppendASCII("send");
     const char dummy[] = "dummy";
     EXPECT_GT(base::WriteFile(*incoming_dump, dummy, arraysize(dummy)), 0);
     EXPECT_GT(base::WriteFile(*outgoing_dump, dummy, arraysize(dummy)), 0);
   }
 
@@ skipping 292 matching lines @@
   handler_->StopOngoingDumps(
       base::Bind(&WebRtcRtpDumpHandlerTest::OnStopOngoingDumpsFinished,
                  base::Unretained(this)));
 
   base::RunLoop().RunUntilIdle();
 
   WebRtcRtpDumpHandler::ReleasedDumps dumps(handler_->ReleaseDumps());
   EXPECT_FALSE(dumps.incoming_dump_path.empty());
   EXPECT_FALSE(dumps.outgoing_dump_path.empty());
 }
+
+TEST_F(WebRtcRtpDumpHandlerTest, DeleteHandlerBeforeStopCallback) {
+  std::string error;
+
+  EXPECT_CALL(*this, OnStopOngoingDumpsFinished())
+      .WillOnce(testing::InvokeWithoutArgs(
+          this, &WebRtcRtpDumpHandlerTest::DeleteDumpHandler));
+
+  EXPECT_TRUE(handler_->StartDump(RTP_DUMP_BOTH, &error));
+
+  handler_->StopOngoingDumps(
+      base::Bind(&WebRtcRtpDumpHandlerTest::OnStopOngoingDumpsFinished,
+                 base::Unretained(this)));
+
+  base::RunLoop().RunUntilIdle();
+}