Move a few functions commonly called with char* to StringPiece.

In some cases this will avoid the implicit char* -> std::string conversion,
object creation, and string copying.  One of the biggest benefit is on Windows,
where we can save some conversions in FilePath::AppendASCII.

Review URL: http://codereview.chromium.org/113996


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17182 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 3 insertions, 3 deletions

diff --git a/base/string_util.h b/base/string_util.h
index f40cc8d..b082078 100644
--- a/base/string_util.h
+++ b/base/string_util.h
@@ -174,9 +174,9 @@ std::wstring CollapseWhitespace(const std::wstring& text,
 
 // These convert between ASCII (7-bit) and Wide/UTF16 strings.
 std::string WideToASCII(const std::wstring& wide);
-std::wstring ASCIIToWide(const std::string& ascii);
+std::wstring ASCIIToWide(const StringPiece& ascii);
 std::string UTF16ToASCII(const string16& utf16);
-string16 ASCIIToUTF16(const std::string& ascii);
+string16 ASCIIToUTF16(const StringPiece& ascii);
 
 // These convert between UTF-8, -16, and -32 strings. They are potentially slow,
 // so avoid unnecessary conversions. The low-level versions return a boolean
@@ -252,7 +252,7 @@ bool IsString8Bit(const std::wstring& str);
 bool IsStringUTF8(const std::string& str);
 bool IsStringWideUTF8(const std::wstring& str);
 bool IsStringASCII(const std::wstring& str);
-bool IsStringASCII(const std::string& str);
+bool IsStringASCII(const StringPiece& str);
 bool IsStringASCII(const string16& str);
 
 // ASCII-specific tolower.  The standard library's tolower is locale sensitive,