Adding metrics on the usefulness of the Win10 version of the Welcome Page

chrome/browser/ui/webui/welcome_win10_handler.h

Index: chrome/browser/ui/webui/welcome_win10_handler.h
diff --git a/chrome/browser/ui/webui/welcome_win10_handler.h b/chrome/browser/ui/webui/welcome_win10_handler.h
index 440eb75641ce1bb603bb2ab35997ed0dac3e8587..4bc6e32fda68ce7641b25889a3e755f19ba7607a 100644
--- a/chrome/browser/ui/webui/welcome_win10_handler.h
+++ b/chrome/browser/ui/webui/welcome_win10_handler.h
@@ -20,7 +20,7 @@ class ListValue;
 // Handles actions on the Windows 10 specific Welcome page.
 class WelcomeWin10Handler : public content::WebUIMessageHandler {
  public:
-  WelcomeWin10Handler();
+  explicit WelcomeWin10Handler(bool inline_style_variant);
   ~WelcomeWin10Handler() override;
 
   // content::WebUIMessageHandler:
@@ -58,6 +58,9 @@ class WelcomeWin10Handler : public content::WebUIMessageHandler {
   // when it is received, or wait for the call to happen.
   std::string pinned_state_callback_id_;
 
+  // Indicates if the inline style variant is displayed.
+  bool inline_style_variant_;
+
   base::WeakPtrFactory<WelcomeWin10Handler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WelcomeWin10Handler);