Remove const from `const int loops`.

bench/GLBench.cpp

Index: bench/GLBench.cpp
diff --git a/bench/GLBench.cpp b/bench/GLBench.cpp
index 23dd04f6373fc34ed288cde1aee24779159b195e..e51adba6e353bfdc4390ecedb9dd899274b6eae2 100644
--- a/bench/GLBench.cpp
+++ b/bench/GLBench.cpp
@@ -50,7 +50,7 @@ void GLBench::onPostDraw(SkCanvas* canvas) {
     this->teardown(ctx->interface());
 }
 
-void GLBench::onDraw(const int loops, SkCanvas* canvas) {
+void GLBench::onDraw(int loops, SkCanvas* canvas) {
     const GrGLContext* ctx = this->getGLContext(canvas);
     if (!ctx) {
         return;