Add Generic Implementation of ClipboardRecentContent

chrome/browser/android/omnibox/autocomplete_controller_android.cc

Index: chrome/browser/android/omnibox/autocomplete_controller_android.cc
diff --git a/chrome/browser/android/omnibox/autocomplete_controller_android.cc b/chrome/browser/android/omnibox/autocomplete_controller_android.cc
index f5755af2bae463fcee1d38970802367a1230591a..91949c39eed0b5c04e6617f688820e8e0b28a92b 100644
--- a/chrome/browser/android/omnibox/autocomplete_controller_android.cc
+++ b/chrome/browser/android/omnibox/autocomplete_controller_android.cc
@@ -10,6 +10,7 @@
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/memory/ptr_util.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ -42,6 +43,7 @@
 #include "components/omnibox/browser/omnibox_field_trial.h"
 #include "components/omnibox/browser/omnibox_log.h"
 #include "components/omnibox/browser/search_provider.h"
+#include "components/open_from_clipboard/clipboard_recent_content.h"
 #include "components/prefs/pref_service.h"
 #include "components/search_engines/template_url_service.h"
 #include "components/toolbar/toolbar_model.h"
@@ -226,6 +228,12 @@ void AutocompleteControllerAndroid::OnSuggestionSelected(
   content::WebContents* web_contents =
       content::WebContents::FromJavaWebContents(j_web_contents);
 
+  if (autocomplete_controller_->result().match_at(selected_index).type ==

[Mark P, 2017/04/01 05:21:04]

For context, this call should be analogous to this iOS call.
https://cs.chromium.org/chromium/src/ios/chrome/browser/ui/omnibox/omnibox_po...

+      AutocompleteMatchType::CLIPBOARD) {
+    UMA_HISTOGRAM_LONG_TIMES_100(
+        "MobileOmnibox.PressedClipboardSuggestionAge",
+        ClipboardRecentContent::GetInstance()->GetClipboardContentAge());
+  }
   OmniboxLog log(
       // For zero suggest, record an empty input string instead of the
       // current URL.