Remove Sk prefix from some bench classes.

bench/GMBench.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#include "SkGMBench.h"
+#include "GMBench.h"
 
-SkGMBench::SkGMBench(skiagm::GM* gm) : fGM(gm) {
+GMBench::GMBench(skiagm::GM* gm) : fGM(gm) {
     fName.printf("GM:%s", gm->getName());
 }
 
-SkGMBench::~SkGMBench() { delete fGM; }
+GMBench::~GMBench() { delete fGM; }
 
-const char* SkGMBench::onGetName() {
+const char* GMBench::onGetName() {
     return fName.c_str();
 }
 
-bool SkGMBench::isSuitableFor(Backend backend) {
+bool GMBench::isSuitableFor(Backend backend) {
     uint32_t flags = fGM->getFlags();
     switch (backend) {
         case kGPU_Backend:
             return !(skiagm::GM::kSkipGPU_Flag & flags);
         case kPDF_Backend:
             return !(skiagm::GM::kSkipPDF_Flag & flags);
         case kRaster_Backend:
             // GM doesn't have an equivalent flag. If the GM has known issues with 565 then
             // we skip it for ALL raster configs in bench.
             return !(skiagm::GM::kSkip565_Flag & flags);
         case kNonRendering_Backend:
             return false;
         default:
             SkDEBUGFAIL("Unexpected backend type.");
             return false;
     }
 }
 
-void SkGMBench::onDraw(const int loops, SkCanvas* canvas) {
+void GMBench::onDraw(const 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);
     for (int i = 0; i < loops; ++i) {
         fGM->drawContent(canvas);
     }
 }
 
-SkIPoint SkGMBench::onGetSize() {
+SkIPoint GMBench::onGetSize() {
     SkISize size = fGM->getISize();
     return SkIPoint::Make(size.fWidth, size.fHeight);
 }