Removed some URL Utility functions & improved unit tests

ios/chrome/browser/chrome_url_util.h

Index: ios/chrome/browser/chrome_url_util.h
diff --git a/ios/chrome/browser/chrome_url_util.h b/ios/chrome/browser/chrome_url_util.h
index 8d44cd0c12e060a98a3845450eb8696d1725ff49..6d24765563fd9b9e8d2206d99aa8af6e42aad57a 100644
--- a/ios/chrome/browser/chrome_url_util.h
+++ b/ios/chrome/browser/chrome_url_util.h
@@ -14,12 +14,6 @@ class GURL;
 // Returns whether |url| is an external file reference.
 bool UrlIsExternalFileReference(const GURL& url);
 
-// Returns a URL that launches Chrome.
-NSURL* UrlToLaunchChrome();
-
-// Returns the URL for the iOS App Icon for Chrome.
-NSURL* UrlOfChromeAppIcon(int width, int height);
-
 // Returns true if the scheme has a chrome scheme.
 bool UrlHasChromeScheme(const GURL& url);
 bool UrlHasChromeScheme(NSURL* url);
@@ -38,16 +32,9 @@ bool IsHandledProtocol(const std::string& scheme);
 // Returns the URL scheme that launches Chrome.
 - (NSString*)getBundleURLScheme;
 
-// Returns the URL string to the Chrome application icon.
-- (NSString*)getChromeAppIconURLOfWidth:(int)width height:(int)height;
-
 // Method to set the scheme to callback Chrome iOS for testing.
 - (void)setCallbackSchemeForTesting:(NSString*)callbackScheme;
 
-// Method to set a different block to provider the App Icon URL.
-typedef NSString* (^AppIconURLProvider)(int, int);
-- (void)setAppIconURLProviderForTesting:(AppIconURLProvider)block;
-
 @end
 
 #endif  // IOS_CHROME_BROWSER_CHROME_URL_UTIL_H_