Convert remaining StringToLowerASCII to ToLowerASCII.

Remove StringToLowerASCII. This removes the template and makes a consistent call that can take a string piece.

http_response_headers.cc in HttpResponseHeaders::RemoveHeaderLine there seemed to be a bug where it did
  std::string old_header_name_lowercase(name);
where it actually meant
  std::string old_header_name_lowercase(old_header_name);
I fixed this.

There were a number of cases where url.host() or url.scheme() was passed to ToLowerASCII. These are already guaranteed lower-case, so I removed the call.

There were a number of cases in net that did return ToLowerASCII().c_str() when the return type is a std::string, which is unnecessary and wasteful. I removed the c_str() call.

NOPRESUBMIT=true
(for touching code with wstrings)

Review URL: https://codereview.chromium.org/1282363003

Cr-Commit-Position: refs/heads/master@{#342869}

1 files changed, 3 insertions, 4 deletions

diff --git a/media/base/mime_util.cc b/media/base/mime_util.cc
index 50a99c6..2eaf206 100644
--- a/media/base/mime_util.cc
+++ b/media/base/mime_util.cc
@@ -396,8 +396,7 @@ void MimeUtil::InitializeMimeTypeMaps() {
 }
 
 bool MimeUtil::IsSupportedMediaMimeType(const std::string& mime_type) const {
-  return media_map_.find(base::StringToLowerASCII(mime_type)) !=
-         media_map_.end();
+  return media_map_.find(base::ToLowerASCII(mime_type)) != media_map_.end();
 }
 
 
@@ -439,14 +438,14 @@ void MimeUtil::ParseCodecString(const std::string& codecs,
 }
 
 bool MimeUtil::IsStrictMediaMimeType(const std::string& mime_type) const {
-  return strict_format_map_.find(base::StringToLowerASCII(mime_type)) !=
+  return strict_format_map_.find(base::ToLowerASCII(mime_type)) !=
          strict_format_map_.end();
 }
 
 SupportsType MimeUtil::IsSupportedStrictMediaMimeType(
     const std::string& mime_type,
     const std::vector<std::string>& codecs) const {
-  const std::string mime_type_lower_case = base::StringToLowerASCII(mime_type);
+  const std::string mime_type_lower_case = base::ToLowerASCII(mime_type);
   StrictMappings::const_iterator it_strict_map =
       strict_format_map_.find(mime_type_lower_case);
   if (it_strict_map == strict_format_map_.end())