Remove const from `const int loops`.

This drives me nuts, and prevents `while (loops --> 0)`.

BUG=skia:

Review URL: https://codereview.chromium.org/1379923005
diff --git a/bench/SkGlyphCacheBench.cpp b/bench/SkGlyphCacheBench.cpp
index 7865961..c99b572 100644
--- a/bench/SkGlyphCacheBench.cpp
+++ b/bench/SkGlyphCacheBench.cpp
@@ -50,7 +50,7 @@
         return backend == kNonRendering_Backend;
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         size_t oldCacheLimitSize = SkGraphics::GetFontCacheLimit();
         SkGraphics::SetFontCacheLimit(fCacheSize);
         SkTypeface* typeface = sk_tool_utils::create_portable_typeface(
@@ -87,7 +87,7 @@
         return backend == kNonRendering_Backend;
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         size_t oldCacheLimitSize = SkGraphics::GetFontCacheLimit();
         SkGraphics::SetFontCacheLimit(fCacheSize);
         SkTypeface* typefaces[] =