media: Add UMA to report media pipeline start result

media/base/pipeline_impl.cc

 // Copyright (c) 2012 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 "media/base/pipeline_impl.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 738 matching lines @@
 
   state_ = next_state;
   media_log_->AddEvent(media_log_->CreatePipelineStateChangedEvent(next_state));
 }
 
 void PipelineImpl::RendererWrapper::CompleteSeek(base::TimeDelta seek_time,
                                                  PipelineStatus status) {
   DCHECK(media_task_runner_->BelongsToCurrentThread());
   DCHECK(state_ == kStarting || state_ == kSeeking || state_ == kResuming);
 
+  if (state_ == kStarting) {
+    UMA_HISTOGRAM_ENUMERATION("Media.PipelineStatus.Start", status,
+                              PIPELINE_STATUS_MAX + 1);
+  }
+
   DCHECK(pending_callbacks_);
   pending_callbacks_.reset();
 
   if (status != PIPELINE_OK) {
     OnPipelineError(status);
     return;
   }
 
   shared_state_.renderer->StartPlayingFrom(
       std::max(seek_time, demuxer_->GetStartTime()));
@@ skipping 484 matching lines @@
 void PipelineImpl::OnSuspendDone() {
   DVLOG(3) << __func__;
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(IsRunning());
 
   DCHECK(!suspend_cb_.is_null());
   base::ResetAndReturn(&suspend_cb_).Run(PIPELINE_OK);
 }
 
 }  // namespace media