[Manifest] Add metrics recording.

content/renderer/manifest/manifest_uma_util.cc

Index: content/renderer/manifest/manifest_uma_util.cc
diff --git a/content/renderer/manifest/manifest_uma_util.cc b/content/renderer/manifest/manifest_uma_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..513c4d8648b60d025ab77016fe2cfa1a9cf5f1d9
--- /dev/null
+++ b/content/renderer/manifest/manifest_uma_util.cc
@@ -0,0 +1,78 @@
+// 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_uma_util.h"
+
+#include "base/metrics/histogram.h"
+#include "content/public/common/manifest.h"
+
+namespace content {
+
+namespace {
+
+static const char kUMANameParseSuccess[] = "Manifest.ParseSuccess";
+static const char kUMANameFetchResult[] = "Manifest.FetchResult";
+
+// Enum for UMA purposes, make sure you update histograms.xml if you add new
+// result types. Never delete or reorder an entry; only add new entries
+// immediately before MANIFEST_FETCH_RESULT_TYPE_COUNT.
+enum ManifestFetchResultType {
+  MANIFEST_FETCH_SUCCESS = 0,
+  MANIFEST_FETCH_ERROR_EMPTY_URL = 1,
+  MANIFEST_FETCH_ERROR_UNSPECIFIED = 2,
+
+  // Must stay at the end.
+  MANIFEST_FETCH_RESULT_TYPE_COUNT
+};
+
+} // anonymous namespace
+
+void ManifestUmaUtil::ParseSucceeded(const Manifest& manifest) {
+  UMA_HISTOGRAM_BOOLEAN(kUMANameParseSuccess, true);
+  UMA_HISTOGRAM_BOOLEAN("Manifest.IsEmpty", manifest.IsEmpty());
+  if (manifest.IsEmpty())
+    return;
+
+  UMA_HISTOGRAM_BOOLEAN("Manifest.HasProperty.name", !manifest.name.is_null());
+  UMA_HISTOGRAM_BOOLEAN("Manifest.HasProperty.short_name",
+      !manifest.short_name.is_null());
+  UMA_HISTOGRAM_BOOLEAN("Manifest.HasProperty.start_url",
+      !manifest.start_url.is_empty());
+  UMA_HISTOGRAM_BOOLEAN("Manifest.HasProperty.display",
+      manifest.display != Manifest::DISPLAY_MODE_UNSPECIFIED);
+  UMA_HISTOGRAM_BOOLEAN("Manifest.HasProperty.orientation",
+      manifest.orientation != blink::WebScreenOrientationLockDefault);
+  UMA_HISTOGRAM_BOOLEAN("Manifest.HasProperty.icons", !manifest.icons.empty());
+  UMA_HISTOGRAM_BOOLEAN("Manifest.HasProperty.gcm_sender_id",
+      !manifest.gcm_sender_id.is_null());
+}
+
+void ManifestUmaUtil::ParseFailed() {
+  UMA_HISTOGRAM_BOOLEAN(kUMANameParseSuccess, false);
+}
+
+void ManifestUmaUtil::FetchSucceeded() {
+  UMA_HISTOGRAM_ENUMERATION(kUMANameFetchResult,
+                            MANIFEST_FETCH_SUCCESS,
+                            MANIFEST_FETCH_RESULT_TYPE_COUNT);
+}
+
+void ManifestUmaUtil::FetchFailed(FetchFailureReason reason) {
+  ManifestFetchResultType fetch_result_type = MANIFEST_FETCH_RESULT_TYPE_COUNT;
+  switch (reason) {
+    case FETCH_EMPTY_URL:
+      fetch_result_type = MANIFEST_FETCH_ERROR_EMPTY_URL;
+      break;
+    case FETCH_UNSPECIFIED_REASON:
+      fetch_result_type = MANIFEST_FETCH_ERROR_UNSPECIFIED;
+      break;
+  }
+  DCHECK_NE(fetch_result_type, MANIFEST_FETCH_RESULT_TYPE_COUNT);
+
+  UMA_HISTOGRAM_ENUMERATION(kUMANameFetchResult,
+                            fetch_result_type,
+                            MANIFEST_FETCH_RESULT_TYPE_COUNT);
+}
+
+} // namespace content