Remove legacy StartsWithASCII function.

components/html_viewer/web_url_loader_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/html_viewer/web_url_loader_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 12 matching lines @@
 using mojo::URLResponsePtr;
 
 namespace html_viewer {
 namespace {
 
 blink::WebURLResponse::HTTPVersion StatusLineToHTTPVersion(
     const mojo::String& status_line) {
   if (status_line.is_null())
     return blink::WebURLResponse::HTTP_0_9;
 
-  if (base::StartsWithASCII(status_line, "HTTP/1.0", true))
+  if (base::StartsWith(status_line.get(), "HTTP/1.0",
+                       base::CompareCase::SENSITIVE))
     return blink::WebURLResponse::HTTP_1_0;
 
-  if (base::StartsWithASCII(status_line, "HTTP/1.1", true))
+  if (base::StartsWith(status_line.get(), "HTTP/1.1",
+                       base::CompareCase::SENSITIVE))
     return blink::WebURLResponse::HTTP_1_1;
 
   return blink::WebURLResponse::Unknown;
 }
 
 blink::WebURLResponse ToWebURLResponse(const URLResponsePtr& url_response) {
   blink::WebURLResponse result;
   result.initialize();
   result.setURL(GURL(url_response->url));
   result.setMIMEType(blink::WebString::fromUTF8(url_response->mime_type));
@@ skipping 237 matching lines @@
       MOJO_DEADLINE_INDEFINITE,
       base::Bind(&WebURLLoaderImpl::OnResponseBodyStreamReady,
                  weak_factory_.GetWeakPtr()));
 }
 
 void WebURLLoaderImpl::OnResponseBodyStreamReady(MojoResult result) {
   ReadMore();
 }
 
 }  // namespace html_viewer