Remove const from `const int loops`.

bench/GMBench.cpp

Index: bench/GMBench.cpp
diff --git a/bench/GMBench.cpp b/bench/GMBench.cpp
index bcc83eb18c7d4cd7c9d77cd985939d08f06939c5..57f0d3c519c582a3f9b93145a1ccaa18b8d54f65 100644
--- a/bench/GMBench.cpp
+++ b/bench/GMBench.cpp
@@ -21,7 +21,7 @@ bool GMBench::isSuitableFor(Backend backend) {
     return kNonRendering_Backend != backend;
 }
 
-void GMBench::onDraw(const int loops, SkCanvas* canvas) {
+void GMBench::onDraw(int loops, SkCanvas* canvas) {
     // Do we care about timing the draw of the background (once)?
     // Does the GM ever rely on drawBackground to lazily compute something?
     fGM->drawBackground(canvas);