Fix typo in string_util.h

Bug: None
Change-Id: If4f49fc247f9d5086b370a12e2c441f5660567c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633484Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Michael Cui <mlcui@google.com>
Cr-Commit-Position: refs/heads/master@{#844443}

base/strings/string_util.h

@@ -291,9 +291,9 @@ BASE_EXPORT bool IsStringASCII(WStringPiece str);
 // Compare the lower-case form of the given string against the given
 // previously-lower-cased ASCII string (typically a constant).
 BASE_EXPORT bool LowerCaseEqualsASCII(StringPiece str,
-                                      StringPiece lowecase_ascii);
+                                      StringPiece lowercase_ascii);
 BASE_EXPORT bool LowerCaseEqualsASCII(StringPiece16 str,
-                                      StringPiece lowecase_ascii);
+                                      StringPiece lowercase_ascii);
 
 // Performs a case-sensitive string compare of the given 16-bit string against
 // the given 8-bit ASCII string (typically a constant). The behavior is

base/strings/string_util_win.h

@@ -167,7 +167,7 @@ BASE_EXPORT std::wstring CollapseWhitespace(
 BASE_EXPORT bool ContainsOnlyChars(WStringPiece input, WStringPiece characters);
 
 BASE_EXPORT bool LowerCaseEqualsASCII(WStringPiece str,
-                                      StringPiece lowecase_ascii);
+                                      StringPiece lowercase_ascii);
 
 BASE_EXPORT bool EqualsASCII(StringPiece16 str, StringPiece ascii);