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/PathBench.cpp b/bench/PathBench.cpp
index e09fc3e..d0ede02 100644
--- a/bench/PathBench.cpp
+++ b/bench/PathBench.cpp
@@ -51,7 +51,7 @@
         return fName.c_str();
     }
 
-    void onDraw(const int loops, SkCanvas* canvas) override {
+    void onDraw(int loops, SkCanvas* canvas) override {
         SkPaint paint(fPaint);
         this->setupPaint(&paint);
 
@@ -329,7 +329,7 @@
         this->createData(10, 100);
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         for (int i = 0; i < loops; ++i) {
             if (i % 1000 == 0) {
                 fPath.reset();  // PathRef memory can grow without bound otherwise.
@@ -363,7 +363,7 @@
         }
         this->finishedMakingPaths();
     }
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         for (int i = 0; i < loops; ++i) {
             int idx = i & (kPathCnt - 1);
             fCopies[idx] = fPaths[idx];
@@ -403,7 +403,7 @@
         }
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         if (fInPlace) {
             for (int i = 0; i < loops; ++i) {
                 fPaths[i & (kPathCnt - 1)].transform(fMatrix);
@@ -450,7 +450,7 @@
         this->finishedMakingPaths();
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         for (int i = 0; i < loops; ++i) {
             int idx = i & (kPathCnt - 1);
             fParity ^= (fPaths[idx] == fCopies[idx & ~0x1]);
@@ -514,7 +514,7 @@
         this->finishedMakingPaths();
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         switch (fType) {
             case kAdd_AddType:
                 for (int i = 0; i < loops; ++i) {
@@ -582,7 +582,7 @@
         return fName.c_str();
     }
 
-    void onDraw(const int loops, SkCanvas* canvas) override {
+    void onDraw(int loops, SkCanvas* canvas) override {
         SkPaint paint;
 
         paint.setColor(SK_ColorBLACK);
@@ -688,7 +688,7 @@
         SkASSERT(path->isConvex());
     }
 
-    void onDraw(const int loops, SkCanvas* canvas) override {
+    void onDraw(int loops, SkCanvas* canvas) override {
         SkRandom rand;
         SkRect r;
 
@@ -762,7 +762,7 @@
         return fName.c_str();
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         for (int i = 0; i < loops; ++i) {
             const SkRect& rect = fQueryRects[i % kQueryRectCnt];
             fParity = fParity != fPath.conservativelyContainsRect(rect);
@@ -825,7 +825,7 @@
 private:
     const char* onGetName() override { return fName.c_str(); }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         for (int i = 0; i < loops; ++i) {
             fRQ.chop(fDst);
         }
@@ -841,7 +841,7 @@
     ConicBench_EvalPos(bool useV2) : fUseV2(useV2) {
         fName.printf("conic-eval-pos%d", useV2);
     }
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         if (fUseV2) {
             for (int i = 0; i < loops; ++i) {
                 for (int j = 0; j < 1000; ++j) {
@@ -866,7 +866,7 @@
     ConicBench_EvalTan(bool useV2) : fUseV2(useV2) {
         fName.printf("conic-eval-tan%d", useV2);
     }
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         if (fUseV2) {
             for (int i = 0; i < loops; ++i) {
                 for (int j = 0; j < 1000; ++j) {
@@ -930,7 +930,7 @@
         return "conic-compute-error";
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         SkVector err;
         for (int i = 0; i < loops; ++i) {
             for (int j = 0; j < CONICS; ++j) {
@@ -952,7 +952,7 @@
         return "conic-asQuadTol";
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         for (int i = 0; i < loops; ++i) {
             for (int j = 0; j < CONICS; ++j) {
                 fConics[j].asQuadTol(SK_ScalarHalf);
@@ -973,7 +973,7 @@
         return "conic-quadPow2";
     }
 
-    void onDraw(const int loops, SkCanvas*) override {
+    void onDraw(int loops, SkCanvas*) override {
         for (int i = 0; i < loops; ++i) {
             for (int j = 0; j < CONICS; ++j) {
                 fConics[j].computeQuadPOW2(SK_ScalarHalf);