Convert remaining StringToLowerASCII to ToLowerASCII

net/http/http_response_headers.cc

Index: net/http/http_response_headers.cc
diff --git a/net/http/http_response_headers.cc b/net/http/http_response_headers.cc
index 119ec527ef51acb38ec0e2cd71f0f17f4c3cef78..c535e0ab64e1d815972aede695d53b071770fa96 100644
--- a/net/http/http_response_headers.cc
+++ b/net/http/http_response_headers.cc
@@ -206,9 +206,8 @@ void HttpResponseHeaders::Persist(base::Pickle* pickle,
     while (++k < parsed_.size() && parsed_[k].is_continuation()) {}
     --k;
 
-    std::string header_name(parsed_[i].name_begin, parsed_[i].name_end);
-    base::StringToLowerASCII(&header_name);
-
+    std::string header_name = base::ToLowerASCII(
+        base::StringPiece(parsed_[i].name_begin, parsed_[i].name_end));
     if (filter_headers.find(header_name) == filter_headers.end()) {
       // Make sure there is a null after the value.
       blob.append(parsed_[i].name_begin, parsed_[k].value_end);
@@ -248,9 +247,7 @@ void HttpResponseHeaders::Update(const HttpResponseHeaders& new_headers) {
 
     base::StringPiece name(new_parsed[i].name_begin, new_parsed[i].name_end);
     if (ShouldUpdateHeader(name)) {
-      std::string name_lower;
-      name.CopyToString(&name_lower);
-      base::StringToLowerASCII(&name_lower);
+      std::string name_lower = base::ToLowerASCII(name);
       updated_headers.insert(name_lower);
 
       // Preserve this header line in the merged result, making sure there is
@@ -277,8 +274,8 @@ void HttpResponseHeaders::MergeWithHeaders(const std::string& raw_headers,
     while (++k < parsed_.size() && parsed_[k].is_continuation()) {}
     --k;
 
-    std::string name(parsed_[i].name_begin, parsed_[i].name_end);
-    base::StringToLowerASCII(&name);
+    std::string name = base::ToLowerASCII(
+        base::StringPiece(parsed_[i].name_begin, parsed_[i].name_end));
     if (headers_to_remove.find(name) == headers_to_remove.end()) {
       // It's ok to preserve this header in the final result.
       new_raw_headers.append(parsed_[i].name_begin, parsed_[k].value_end);
@@ -300,8 +297,7 @@ void HttpResponseHeaders::RemoveHeader(const std::string& name) {
   std::string new_raw_headers(raw_headers_.c_str());
   new_raw_headers.push_back('\0');
 
-  std::string lowercase_name(name);
-  base::StringToLowerASCII(&lowercase_name);
+  std::string lowercase_name = base::ToLowerASCII(name);
   HeaderSet to_remove;
   to_remove.insert(lowercase_name);
   MergeWithHeaders(new_raw_headers, to_remove);
@@ -309,8 +305,7 @@ void HttpResponseHeaders::RemoveHeader(const std::string& name) {
 
 void HttpResponseHeaders::RemoveHeaderLine(const std::string& name,
                                            const std::string& value) {
-  std::string name_lowercase(name);
-  base::StringToLowerASCII(&name_lowercase);
+  std::string name_lowercase = base::ToLowerASCII(name);
 
   std::string new_raw_headers(GetStatusLine());
   new_raw_headers.push_back('\0');
@@ -321,9 +316,7 @@ void HttpResponseHeaders::RemoveHeaderLine(const std::string& name,
   std::string old_header_name;
   std::string old_header_value;
   while (EnumerateHeaderLines(&iter, &old_header_name, &old_header_value)) {
-    std::string old_header_name_lowercase(name);
-    base::StringToLowerASCII(&old_header_name_lowercase);
-
+    std::string old_header_name_lowercase = base::ToLowerASCII(old_header_name);
     if (name_lowercase == old_header_name_lowercase &&
         value == old_header_value)
       continue;
@@ -473,7 +466,7 @@ void HttpResponseHeaders::GetNormalizedHeaders(std::string* output) const {
     DCHECK(!parsed_[i].is_continuation());
 
     std::string name(parsed_[i].name_begin, parsed_[i].name_end);
-    std::string lower_name = base::StringToLowerASCII(name);
+    std::string lower_name = base::ToLowerASCII(name);
 
     iter = headers_map.find(lower_name);
     if (iter == headers_map.end()) {
@@ -843,9 +836,8 @@ void HttpResponseHeaders::AddNonCacheableHeaders(HeaderSet* result) const {
 
       // assuming the header is not empty, lowercase and insert into set
       if (item_end > item) {
-        std::string name(&*item, item_end - item);
-        base::StringToLowerASCII(&name);
-        result->insert(name);
+        result->insert(
+            base::ToLowerASCII(base::StringPiece(&*item, item_end - item)));
       }
 
       // Continue to next item.