Add Navigation.MainFrameSchemeDifferentPage which excludes same-page navigations.

components/navigation_metrics/navigation_metrics.cc

 // Copyright 2013 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 "components/navigation_metrics/navigation_metrics.h"
 
 #include "base/metrics/histogram.h"
 #include "url/gurl.h"
 
 namespace {
@@ skipping 24 matching lines @@
   "max",
 };
 
 COMPILE_ASSERT(arraysize(kSchemeNames) == SCHEME_MAX + 1,
                NavigationMetricsRecorder_name_count_mismatch);
 
 }  // namespace
 
 namespace navigation_metrics {
 
-void RecordMainFrameNavigation(const GURL& url) {
+void RecordMainFrameNavigation(const GURL& url, bool is_in_page) {
   Scheme scheme = SCHEME_UNKNOWN;
   for (int i = 1; i < SCHEME_MAX; ++i) {
     if (url.SchemeIs(kSchemeNames[i])) {
       scheme = static_cast<Scheme>(i);
       break;
     }
   }
   UMA_HISTOGRAM_ENUMERATION(
       "Navigation.MainFrameScheme", scheme, SCHEME_MAX);
+  if (!is_in_page) {
+    UMA_HISTOGRAM_ENUMERATION(
+        "Navigation.MainFrameSchemeDifferentPage", scheme, SCHEME_MAX);
+  }
 }
 
 }  // namespace navigation_metrics