Final batch adding real histogram values for extension events.

chrome/browser/extensions/api/font_settings/font_settings_api.h

Index: chrome/browser/extensions/api/font_settings/font_settings_api.h
diff --git a/chrome/browser/extensions/api/font_settings/font_settings_api.h b/chrome/browser/extensions/api/font_settings/font_settings_api.h
index 8d506fe0eddd5194add0b0a6a68fa3d765d8dfc8..77f3f38362412e9cdf43a1026379c033854c63dc 100644
--- a/chrome/browser/extensions/api/font_settings/font_settings_api.h
+++ b/chrome/browser/extensions/api/font_settings/font_settings_api.h
@@ -16,6 +16,7 @@
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/event_router.h"
+#include "extensions/browser/extension_event_histogram_value.h"
 
 class Profile;
 
@@ -40,6 +41,7 @@ class FontSettingsEventRouter {
   // event |event_name| to extensions. A JavaScript object is passed to the
   // extension event function with the new value of the pref in property |key|.
   void AddPrefToObserve(const char* pref_name,
+                        events::HistogramValue histogram_value,
                         const char* event_name,
                         const char* key);
 
@@ -58,7 +60,8 @@ class FontSettingsEventRouter {
   // value of the setting is the value of browser pref |pref_name|. This value
   // is passed in the JavaScript object argument to the extension event function
   // under the key |key|.
-  void OnFontPrefChanged(const std::string& event_name,
+  void OnFontPrefChanged(events::HistogramValue histogram_value,
+                         const std::string& event_name,
                          const std::string& key,
                          const std::string& pref_name);