Settings reset prompt: add UMA metrics reporting.

chrome/browser/safe_browsing/settings_reset_prompt/settings_reset_prompt_model.h

Index: chrome/browser/safe_browsing/settings_reset_prompt/settings_reset_prompt_model.h
diff --git a/chrome/browser/safe_browsing/settings_reset_prompt/settings_reset_prompt_model.h b/chrome/browser/safe_browsing/settings_reset_prompt/settings_reset_prompt_model.h
index 771531a8786237212f223d016126b633e34366eb..ade561e43e4b0e3f204f05749589e7d1075a92d4 100644
--- a/chrome/browser/safe_browsing/settings_reset_prompt/settings_reset_prompt_model.h
+++ b/chrome/browser/safe_browsing/settings_reset_prompt/settings_reset_prompt_model.h
@@ -48,6 +48,7 @@ class SettingsResetPromptModel {
     NO_RESET_REQUIRED_DUE_TO_RECENTLY_PROMPTED = 4,
     NO_RESET_REQUIRED_DUE_TO_OTHER_SETTING_REQUIRING_RESET = 5,
     NO_RESET_REQUIRED_DUE_TO_POLICY = 6,
+    RESET_STATE_MAX = 7
   };
 
   using ExtensionMap =
@@ -103,6 +104,9 @@ class SettingsResetPromptModel {
   // be disabled.
   virtual const ExtensionMap& extensions_to_disable() const;
 
+  // Reports some UMA metrics.

[robertshield, 2017/03/07 07:43:19]

nit: redundant comment

[alito, 2017/03/07 16:23:29]

:) indeed. Done.

+  void ReportUmaMetrics() const;
+
  protected:
   // Exposed for mocking in tests.
   SettingsResetPromptModel(