[Cleanup] Const-correct the profile() method for the EasyUnlockService

chrome/browser/profiles/profile.h

Index: chrome/browser/profiles/profile.h
diff --git a/chrome/browser/profiles/profile.h b/chrome/browser/profiles/profile.h
index 3faa74c4bea5e56460f8761b731052fd5f570a98..c3b68a1e172f7336ccf17e4e62df70d621afce8b 100644
--- a/chrome/browser/profiles/profile.h
+++ b/chrome/browser/profiles/profile.h
@@ -153,7 +153,7 @@ class Profile : public content::BrowserContext {
 
   // Returns the username associated with this profile, if any. In non-test
   // implementations, this is usually the Google-services email address.
-  virtual std::string GetProfileUserName() = 0;
+  virtual std::string GetProfileUserName() const = 0;
 
   // Returns the profile type.
   virtual ProfileType GetProfileType() const = 0;
@@ -192,6 +192,7 @@ class Profile : public content::BrowserContext {
   // Retrieves a pointer to the PrefService that manages the
   // preferences for this user profile.
   virtual PrefService* GetPrefs() = 0;
+  virtual const PrefService* GetPrefs() const = 0;
 
   // Retrieves a pointer to the PrefService that manages the default zoom
   // level and the per-host zoom levels for this user profile.