Move StringToLowerASCII to base namespace

chrome/renderer/pepper/pepper_flash_renderer_host.cc

Index: chrome/renderer/pepper/pepper_flash_renderer_host.cc
diff --git a/chrome/renderer/pepper/pepper_flash_renderer_host.cc b/chrome/renderer/pepper/pepper_flash_renderer_host.cc
index 80823b1ae67ed9071afdc1cbc875b15776ce27c8..85aa804a0db2fc02c87d80a781fa2a963000a78c 100644
--- a/chrome/renderer/pepper/pepper_flash_renderer_host.cc
+++ b/chrome/renderer/pepper/pepper_flash_renderer_host.cc
@@ -317,7 +317,8 @@ int32_t PepperFlashRendererHost::OnNavigate(
       data.headers.begin(), data.headers.end(), "\n\r");
   bool rejected = false;
   while (header_iter.GetNext()) {
-    std::string lower_case_header_name = StringToLowerASCII(header_iter.name());
+    std::string lower_case_header_name =
+        base::StringToLowerASCII(header_iter.name());
     if (!IsSimpleHeader(lower_case_header_name, header_iter.values())) {
       rejected = true;