[Manifest] Add metrics recording.

content/renderer/manifest/manifest_manager.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 "content/renderer/manifest/manifest_manager.h"
 
 #include "base/bind.h"
 #include "base/strings/nullable_string16.h"
 #include "content/common/manifest_manager_messages.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/renderer/fetchers/manifest_fetcher.h"
 #include "content/renderer/manifest/manifest_parser.h"
+#include "content/renderer/manifest/manifest_uma_util.h"
 #include "third_party/WebKit/public/platform/WebURLResponse.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 
 namespace content {
 
 ManifestManager::ManifestManager(RenderFrame* render_frame)
     : RenderFrameObserver(render_frame),
       may_have_manifest_(false),
       manifest_dirty_(true) {
@@ skipping 73 matching lines @@
 
 void ManifestManager::DidChangeManifest() {
   may_have_manifest_ = true;
   manifest_dirty_ = true;
 }
 
 void ManifestManager::FetchManifest() {
   GURL url(render_frame()->GetWebFrame()->document().manifestURL());
 
   if (url.is_empty()) {
+    ManifestUmaUtil::FetchFailed(ManifestUmaUtil::FETCH_EMPTY_URL);
     ResolveCallbacks(ResolveStateFailure);
     return;
   }
 
   fetcher_.reset(new ManifestFetcher(url));
 
   // TODO(mlamouri,kenneth): this is not yet taking into account manifest-src
   // CSP rule, see http://crbug.com/409996.
   fetcher_->Start(render_frame()->GetWebFrame(),
                   base::Bind(&ManifestManager::OnManifestFetchComplete,
                              base::Unretained(this),
                              render_frame()->GetWebFrame()->document().url()));
 }
 
 void ManifestManager::OnManifestFetchComplete(
     const GURL& document_url,
     const blink::WebURLResponse& response,
     const std::string& data) {
   if (response.isNull() && data.empty()) {
+    ManifestUmaUtil::FetchFailed(ManifestUmaUtil::FETCH_UNSPECIFIED_REASON);
     ResolveCallbacks(ResolveStateFailure);
     return;
   }
 
+  ManifestUmaUtil::FetchSucceeded();
   manifest_ = ManifestParser::Parse(data, response.url(), document_url);
 
   fetcher_.reset();
   ResolveCallbacks(ResolveStateSuccess);
 }
 
 void ManifestManager::ResolveCallbacks(ResolveState state) {
   if (state == ResolveStateFailure)
     manifest_ = Manifest();
 
   manifest_dirty_ = state != ResolveStateSuccess;
 
   Manifest manifest = manifest_;
   std::list<GetManifestCallback> callbacks = pending_callbacks_;
 
   pending_callbacks_.clear();
 
   for (std::list<GetManifestCallback>::const_iterator it = callbacks.begin();
        it != callbacks.end(); ++it) {
     it->Run(manifest);
   }
 }
 
 } // namespace content