Remove all blimp engine code

blimp/engine/app/blimp_stability_metrics_provider.cc

Index: blimp/engine/app/blimp_stability_metrics_provider.cc
diff --git a/blimp/engine/app/blimp_stability_metrics_provider.cc b/blimp/engine/app/blimp_stability_metrics_provider.cc
deleted file mode 100644
index 61da99a14d1cbdae0ae46cc8a9135172fdae5d05..0000000000000000000000000000000000000000
--- a/blimp/engine/app/blimp_stability_metrics_provider.cc
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright 2016 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 "blimp/engine/app/blimp_stability_metrics_provider.h"
-
-#include <vector>
-
-#include "base/logging.h"
-#include "base/metrics/histogram.h"
-#include "base/metrics/sparse_histogram.h"
-#include "build/build_config.h"
-#include "content/public/browser/child_process_data.h"
-#include "content/public/browser/notification_service.h"
-#include "content/public/browser/notification_types.h"
-#include "content/public/browser/render_process_host.h"
-
-BlimpStabilityMetricsProvider::BlimpStabilityMetricsProvider(
-    PrefService* local_state)
-    : helper_(local_state) {
-  BrowserChildProcessObserver::Add(this);
-}
-
-BlimpStabilityMetricsProvider::~BlimpStabilityMetricsProvider() {
-  BrowserChildProcessObserver::Remove(this);
-}
-
-void BlimpStabilityMetricsProvider::OnRecordingEnabled() {
-  registrar_.Add(this,
-                 content::NOTIFICATION_LOAD_START,
-                 content::NotificationService::AllSources());
-  registrar_.Add(this,
-                 content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
-                 content::NotificationService::AllSources());
-  registrar_.Add(this,
-                 content::NOTIFICATION_RENDER_WIDGET_HOST_HANG,
-                 content::NotificationService::AllSources());
-}
-
-void BlimpStabilityMetricsProvider::OnRecordingDisabled() {
-  registrar_.RemoveAll();
-}
-
-void BlimpStabilityMetricsProvider::ProvideStabilityMetrics(
-    metrics::SystemProfileProto* system_profile_proto) {
-  helper_.ProvideStabilityMetrics(system_profile_proto);
-}
-
-void BlimpStabilityMetricsProvider::ClearSavedStabilityMetrics() {
-  helper_.ClearSavedStabilityMetrics();
-}
-
-void BlimpStabilityMetricsProvider::Observe(
-    int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  switch (type) {
-    case content::NOTIFICATION_LOAD_START: {
-      helper_.LogLoadStarted();
-      break;
-    }
-
-    case content::NOTIFICATION_RENDERER_PROCESS_CLOSED: {
-      content::RenderProcessHost::RendererClosedDetails* process_details =
-          content::Details<content::RenderProcessHost::RendererClosedDetails>(
-              details).ptr();
-      bool was_extension_process = false;
-      helper_.LogRendererCrash(was_extension_process, process_details->status,
-                               process_details->exit_code);
-      break;
-    }
-
-    case content::NOTIFICATION_RENDER_WIDGET_HOST_HANG:
-      helper_.LogRendererHang();
-      break;
-
-    default:
-      NOTREACHED();
-      break;
-  }
-}
-
-void BlimpStabilityMetricsProvider::BrowserChildProcessCrashed(
-    const content::ChildProcessData& data,
-    int exit_code) {
-  helper_.BrowserChildProcessCrashed();
-}