Major bench refactoring.
   - Use FLAGS_.
   - Remove outer repeat loop.
   - Tune inner loop automatically.

BUG=skia:1590
R=epoger@google.com, scroggo@google.com

Review URL: https://codereview.chromium.org/23478013

git-svn-id: http://skia.googlecode.com/svn/trunk@11187 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/DisplacementBench.cpp b/bench/DisplacementBench.cpp
index e498a1b..bf1ee73 100644
--- a/bench/DisplacementBench.cpp
+++ b/bench/DisplacementBench.cpp
@@ -105,7 +105,10 @@
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kR_ChannelSelectorType,
              SkDisplacementMapEffect::kG_ChannelSelectorType, 0.0f, displ)))->unref();
-        drawClippedBitmap(canvas, 0, 0, paint);
+
+        for (int i = 0; i < this->getLoops(); i++) {
+            drawClippedBitmap(canvas, 0, 0, paint);
+        }
     }
 
 private:
@@ -129,7 +132,9 @@
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kB_ChannelSelectorType,
              SkDisplacementMapEffect::kA_ChannelSelectorType, 16.0f, displ)))->unref();
-        drawClippedBitmap(canvas, 100, 0, paint);
+        for (int i = 0; i < this->getLoops(); i++) {
+            drawClippedBitmap(canvas, 100, 0, paint);
+        }
     }
 
 private:
@@ -153,7 +158,9 @@
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kR_ChannelSelectorType,
              SkDisplacementMapEffect::kB_ChannelSelectorType, 32.0f, displ)))->unref();
-        drawClippedBitmap(canvas, 200, 0, paint);
+        for (int i = 0; i < this->getLoops(); i++) {
+            drawClippedBitmap(canvas, 200, 0, paint);
+        }
     }
 
 private: