Remove legacy StartsWithASCII function.

components/html_viewer/web_mime_registry_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_mime_registry_impl.h"
 
 #include "base/files/file_path.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 26 matching lines @@
   return mime_util::IsSupportedImageMimeType(ToASCIIOrEmpty(mime_type))
              ? blink::WebMimeRegistry::IsSupported
              : blink::WebMimeRegistry::IsNotSupported;
 }
 
 blink::WebMimeRegistry::SupportsType
 WebMimeRegistryImpl::supportsImagePrefixedMIMEType(
     const blink::WebString& mime_type) {
   std::string ascii_mime_type = ToASCIIOrEmpty(mime_type);
   return (mime_util::IsSupportedImageMimeType(ascii_mime_type) ||
-          (base::StartsWithASCII(ascii_mime_type, "image/", true) &&
+          (base::StartsWith(ascii_mime_type, "image/",
+                            base::CompareCase::SENSITIVE) &&
            mime_util::IsSupportedNonImageMimeType(ascii_mime_type)))
              ? WebMimeRegistry::IsSupported
              : WebMimeRegistry::IsNotSupported;
 }
 
 blink::WebMimeRegistry::SupportsType
     WebMimeRegistryImpl::supportsJavaScriptMIMEType(
     const blink::WebString& mime_type) {
   return mime_util::IsSupportedJavascriptMimeType(ToASCIIOrEmpty(mime_type))
              ? blink::WebMimeRegistry::IsSupported
@@ skipping 71 matching lines @@
 
 blink::WebString WebMimeRegistryImpl::mimeTypeFromFile(
     const blink::WebString& file_path) {
   std::string mime_type;
   net::GetMimeTypeFromFile(base::FilePath::FromUTF16Unsafe(file_path),
                            &mime_type);
   return blink::WebString::fromUTF8(mime_type);
 }
 
 }  // namespace html_viewer