NO CODE CHANGE. Update string_piece.h to new include style, and remove Ben's trailing whitespace. Really just want a buildbot run :\

Review URL: http://codereview.chromium.org/9730

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@5075 0039d316-1c4b-4281-b951-d872f2087c98

base/string_piece.cc

@@ -213,4 +213,3 @@ StringPiece StringPiece::substr(size_type pos, size_type n) const {
 }
 
 const StringPiece::size_type StringPiece::npos = size_type(-1);
-

base/string_piece.h

@@ -15,8 +15,8 @@
 // conversions from "const char*" to "string" and back again.
 //
 
-#ifndef BASE_STRING_PIECE_H__
-#define BASE_STRING_PIECE_H__
+#ifndef BASE_STRING_PIECE_H_
+#define BASE_STRING_PIECE_H_
 
 #include <algorithm>
 #include <iosfwd>
@@ -181,5 +181,4 @@ inline bool operator>=(const StringPiece& x, const StringPiece& y) {
 // allow StringPiece to be logged (needed for unit testing).
 extern std::ostream& operator<<(std::ostream& o, const StringPiece& piece);
 
-#endif  // BASE_STRING_PIECE_H__
-
+#endif  // BASE_STRING_PIECE_H_

base/string_piece_unittest.cc

@@ -538,4 +538,3 @@ TEST(StringPieceTest, HeterogenousStringPieceEquals) {
   ASSERT_TRUE(StringPiece("hello") == std::string("hello"));
   ASSERT_TRUE("hello" == StringPiece("hello"));
 }
-