Revert "Added dead variable / code elimination to skslc."

This reverts commit 113628d76176a1ab3e6719c59efff23cd10ab213.

Reason for revert: Looks to have caused https://bugs.chromium.org/p/chromium/issues/detail?id=688939

Original change's description:
> Added dead variable / code elimination to skslc.
> 
> BUG=skia:
> 
> Change-Id: Ib037730803a8f222f099de0e001fe06ad452a22c
> Reviewed-on: https://skia-review.googlesource.com/7584
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Ben Wagner <benjaminwagner@google.com>
> 

TBR=egdaniel@google.com,benjaminwagner@google.com,ethannicholas@google.com,reviews@skia.org
# Not skipping CQ checks because original CL landed > 1 day ago.
BUG=skia:

Change-Id: I85599e4ca2bc6bfd782edc163f67b64195d6ae65
Reviewed-on: https://skia-review.googlesource.com/8077
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 1 insertions, 10 deletions

diff --git a/src/sksl/ir/SkSLBlock.h b/src/sksl/ir/SkSLBlock.h
index f00c146725..17970fd561 100644
--- a/src/sksl/ir/SkSLBlock.h
+++ b/src/sksl/ir/SkSLBlock.h
@@ -23,15 +23,6 @@ struct Block : public Statement {
     , fSymbols(std::move(symbols))
     , fStatements(std::move(statements)) {}
 
-    virtual bool isEmpty() const override {
-        for (const auto& s : fStatements) {
-            if (!s->isEmpty()) {
-                return false;
-            }
-        }
-        return true;
-    }
-
     SkString description() const override {
         SkString result("{");
         for (size_t i = 0; i < fStatements.size(); i++) {
@@ -45,7 +36,7 @@ struct Block : public Statement {
     // it's important to keep fStatements defined after (and thus destroyed before) fSymbols,
     // because destroying statements can modify reference counts in symbols
     const std::shared_ptr<SymbolTable> fSymbols;
-    std::vector<std::unique_ptr<Statement>> fStatements;
+    const std::vector<std::unique_ptr<Statement>> fStatements;
 
     typedef Statement INHERITED;
 };