[Win] Add a fast profile switcher to the Windows taskbar item.

chrome/browser/jumplist_metrics.cc

Index: chrome/browser/jumplist_metrics.cc
diff --git a/chrome/browser/jumplist_metrics.cc b/chrome/browser/jumplist_metrics.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e509d9d4173dd61d4f5aa7d213f771f40914f296
--- /dev/null
+++ b/chrome/browser/jumplist_metrics.cc
@@ -0,0 +1,27 @@
+// 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 "chrome/browser/jumplist_metrics.h"

[tapted, 2014/11/10 23:47:41]

Name this .cc file (and header) jumplist_metrics_win? This will just stop it
getting compiled/linked on non-Windows (but the linker should cull it
regardless)

[noms (inactive), 2014/11/12 19:04:11]

Done.

+
+#include "base/metrics/histogram.h"
+
+// static

[tapted, 2014/11/10 23:47:41]

nit: usually this just goes before static member function definitions (since
data member definitions are always static).

[noms (inactive), 2014/11/12 19:04:11]

Done.

+const char JumplistMetrics::kMostVisitedCategory[] = "most-visited";
+const char JumplistMetrics::kProfilesCategory[] = "profiles";
+const char JumplistMetrics::kRecentlyClosedCategory[] = "recently-closed";
+
+void JumplistMetrics::LogJumplistActionFromSwitchValue(
+    const std::string& value) {
+  JumplistCategory metric = CATEGORY_UNKNOWN;
+  if (value == kMostVisitedCategory)
+    metric = MOST_VISITED_URL;
+  else if (value == kProfilesCategory)
+    metric = SWITCH_TO_PROFILE;
+  else if (value == kRecentlyClosedCategory)
+    metric = RECENTLY_CLOSED_URL;
+  DCHECK_NE(metric, CATEGORY_UNKNOWN);
+
+  UMA_HISTOGRAM_ENUMERATION(
+      "WinJumplist.Action", metric, NUM_JUMPLIST_CATEGORY_METRICS);
+}