Convert remaining StringToLowerASCII to ToLowerASCII

pdf/pdfium/pdfium_page.cc

Index: pdf/pdfium/pdfium_page.cc
diff --git a/pdf/pdfium/pdfium_page.cc b/pdf/pdfium/pdfium_page.cc
index a7912a6e344bf60ebe8f3382be9f9620444d0cec..79410c46987c0e907459cb39ab7452415efbf1db 100644
--- a/pdf/pdfium/pdfium_page.cc
+++ b/pdf/pdfium/pdfium_page.cc
@@ -204,8 +204,8 @@ base::Value* PDFiumPage::GetTextBoxAsValue(double page_height,
         DCHECK(targets[i].url[targets[i].url.size() - 1] != '\0');
 
       // PDFium may change the case of generated links.
-      std::string lowerCaseURL = base::StringToLowerASCII(targets[i].url);
-      std::string lowerCaseText = base::StringToLowerASCII(text_utf8);
+      std::string lowerCaseURL = base::ToLowerASCII(targets[i].url);
+      std::string lowerCaseText = base::ToLowerASCII(text_utf8);
       size_t pos = lowerCaseText.find(lowerCaseURL, start);
       size_t length = targets[i].url.size();
       if (pos == std::string::npos) {