Revert "Revert "Switch to the new SkSL lexer.""

This reverts commit 358515491a0d6891e6a709688a30ad087df1beb1.

Bug: skia:
Change-Id: I013fac0ed83774d8ae7c6ee6819045cab37f5e97
Reviewed-on: https://skia-review.googlesource.com/45180
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/sksl/SkSLSPIRVCodeGenerator.h b/src/sksl/SkSLSPIRVCodeGenerator.h
index a532c9a..eb6ec40 100644
--- a/src/sksl/SkSLSPIRVCodeGenerator.h
+++ b/src/sksl/SkSLSPIRVCodeGenerator.h
@@ -241,19 +241,19 @@
 
     void writeWord(int32_t word, OutputStream& out);
 
-    void writeString(const char* string, OutputStream& out);
+    void writeString(const char* string, size_t length, OutputStream& out);
 
     void writeLabel(SpvId id, OutputStream& out);
 
     void writeInstruction(SpvOp_ opCode, OutputStream& out);
 
-    void writeInstruction(SpvOp_ opCode, const char* string, OutputStream& out);
+    void writeInstruction(SpvOp_ opCode, StringFragment string, OutputStream& out);
 
     void writeInstruction(SpvOp_ opCode, int32_t word1, OutputStream& out);
 
-    void writeInstruction(SpvOp_ opCode, int32_t word1, const char* string, OutputStream& out);
+    void writeInstruction(SpvOp_ opCode, int32_t word1, StringFragment string, OutputStream& out);
 
-    void writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2, const char* string,
+    void writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2, StringFragment string,
                           OutputStream& out);
 
     void writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2, OutputStream& out);