Switch to the new SkSL lexer.

This completely replaces flex with a new in-house lexical analyzer generator,
which we have done for performance and memory usage reasons. Flex requires us
to copy strings every time we need the text of a token, whereas this new lexer
allows us to handle strings as a (non-null-terminated) pointer and length
everywhere, eliminating most string copies.

Bug: skia:
Change-Id: I2add26efc9e20cb699520e82abcf713af3968aca
Reviewed-on: https://skia-review.googlesource.com/39780
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 0 insertions, 12 deletions

diff --git a/src/sksl/lex.layout.h b/src/sksl/lex.layout.h
deleted file mode 100644
index 345b336253..0000000000
--- a/src/sksl/lex.layout.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/*
- * Copyright 2017 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-int layoutlex_init(yyscan_t* ptr_yy_globals);
-int layoutlex_destroy(void* scanner);
-YY_BUFFER_STATE layout_scan_string(const char* s, void* scanner);
-int layoutlex(void* yyscanner);
-void layout_delete_buffer(YY_BUFFER_STATE b, void* yyscanner);