Revert "switched skslc from std::string to SkString"

This reverts commit d8df21a1e08b5b3380261f4b90acfbdc538ef93c.

Reason for revert: Breaking Roll

Original change's description:
> switched skslc from std::string to SkString
> 
> BUG=skia:
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4977
> 
> Change-Id: I15e24963b09b719a2c07da67745114f5ac66cee8
> Reviewed-on: https://skia-review.googlesource.com/4977
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> 

TBR=bsalomon@google.com,benjaminwagner@google.com,ethannicholas@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I84d5311beb9d5e607b7a4a3c138332f0c8f19648
Reviewed-on: https://skia-review.googlesource.com/5077
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/src/sksl/SkSLGLSLCodeGenerator.h b/src/sksl/SkSLGLSLCodeGenerator.h
index b8cb34e84f..16d6192a71 100644
--- a/src/sksl/SkSLGLSLCodeGenerator.h
+++ b/src/sksl/SkSLGLSLCodeGenerator.h
@@ -12,7 +12,6 @@
 #include <tuple>
 #include <unordered_map>
 
-#include "SkStream.h"
 #include "glsl/GrGLSLCaps.h"
 #include "SkSLCodeGenerator.h"
 #include "ir/SkSLBinaryExpression.h"
@@ -76,7 +75,7 @@ public:
     : fContext(*context)
     , fCaps(*caps) {}
 
-    void generateCode(const Program& program, SkWStream& out) override;
+    void generateCode(const Program& program, std::ostream& out) override;
 
 private:
     void write(const char* s);
@@ -85,9 +84,9 @@ private:
 
     void writeLine(const char* s);
 
-    void write(const SkString& s);
+    void write(const std::string& s);
 
-    void writeLine(const SkString& s);
+    void writeLine(const std::string& s);
 
     void writeType(const Type& type);
 
@@ -157,9 +156,9 @@ private:
 
     const Context& fContext;
     const GrGLSLCaps& fCaps;
-    SkWStream* fOut = nullptr;
-    SkDynamicMemoryWStream fHeader;
-    SkString fFunctionHeader;
+    std::ostream* fOut = nullptr;
+    std::stringstream fHeader;
+    std::string fFunctionHeader;
     Program::Kind fProgramKind;
     int fVarCount = 0;
     int fIndentation = 0;