Make KURL::protocolIs take StringView (+ DCHECK cleanups)

third_party/WebKit/Source/platform/weborigin/KURL.h

Index: third_party/WebKit/Source/platform/weborigin/KURL.h
diff --git a/third_party/WebKit/Source/platform/weborigin/KURL.h b/third_party/WebKit/Source/platform/weborigin/KURL.h
index c6d38fb6584ff517ec8c7239d05fd0ff92812493..489bc70117b777df02ae4930230c227455c4e8a3 100644
--- a/third_party/WebKit/Source/platform/weborigin/KURL.h
+++ b/third_party/WebKit/Source/platform/weborigin/KURL.h
@@ -136,9 +136,9 @@ class PLATFORM_EXPORT KURL {
 
   String baseAsString() const;
 
-  // Returns true if the current URL's protocol is the same as the null-
-  // terminated ASCII argument. The argument must be lower-case.
-  bool protocolIs(const char*) const;
+  // Returns true if the current URL's protocol is the same as the StringView
+  // argument. The argument must be lower-case.
+  bool protocolIs(const StringView protocol) const;
   bool protocolIsData() const { return protocolIs("data"); }
   // This includes at least about:blank and about:srcdoc.
   bool protocolIsAbout() const { return protocolIs("about"); }