Add Histogram Macros to Skia

src/gpu/SkGpuDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "GrBlurUtils.h"
@@ skipping 916 matching lines @@
 void SkGpuDevice::drawTiledBitmap(const SkBitmap& bitmap,
                                   const SkMatrix& viewMatrix,
                                   const SkRect& srcRect,
                                   const SkIRect& clippedSrcIRect,
                                   const GrTextureParams& params,
                                   const SkPaint& origPaint,
                                   SkCanvas::SrcRectConstraint constraint,
                                   int tileSize,
                                   bool bicubic) {
     ASSERT_SINGLE_OWNER
+
+    // This is the funnel for all paths that draw tiled bitmaps/images. Log histogram entry.
+    SK_HISTOGRAM_BOOLEAN("DrawTiled", true);
+
     // The following pixel lock is technically redundant, but it is desirable
     // to lock outside of the tile loop to prevent redecoding the whole image
     // at each tile in cases where 'bitmap' holds an SkDiscardablePixelRef that
     // is larger than the limit of the discardable memory pool.
     SkAutoLockPixels alp(bitmap);
 
     const SkPaint* paint = &origPaint;
     SkPaint tempPaint;
     if (origPaint.isAntiAlias() && !fRenderTarget->isUnifiedMultisampled()) {
         // Drop antialiasing to avoid seams at tile boundaries.
@@ skipping 953 matching lines @@
 }
 
 SkImageFilter::Cache* SkGpuDevice::getImageFilterCache() {
     ASSERT_SINGLE_OWNER
     // We always return a transient cache, so it is freed after each
     // filter traversal.
     return SkGpuDevice::NewImageFilterCache();
 }
 
 #endif