Remove legacy StartsWithASCII function.

content/renderer/savable_resources.cc

Index: content/renderer/savable_resources.cc
diff --git a/content/renderer/savable_resources.cc b/content/renderer/savable_resources.cc
index 933ce96c12836ae3f6ec7955fe7498b4cd26af72..b5fdf8e53d0161b36ce2e7166817590e33a0e44f 100644
--- a/content/renderer/savable_resources.cc
+++ b/content/renderer/savable_resources.cc
@@ -180,7 +180,8 @@ WebString GetSubResourceLinkFromElement(const WebElement& element) {
   // If value has content and not start with "javascript:" then return it,
   // otherwise return NULL.
   if (!value.isNull() && !value.isEmpty() &&
-      !base::StartsWithASCII(value.utf8(), "javascript:", false))
+      !base::StartsWith(value.utf8(), "javascript:",
+                        base::CompareCase::INSENSITIVE_ASCII))
     return value;
 
   return WebString();