Update bench to be able to preprocess skps

tools/PictureBenchmark.cpp

Index: tools/PictureBenchmark.cpp
===================================================================
--- tools/PictureBenchmark.cpp	(revision 14136)
+++ tools/PictureBenchmark.cpp	(working copy)
@@ -23,6 +23,7 @@
 , fTimerTypes(0)
 , fTimeIndividualTiles(false)
 , fPurgeDecodedTex(false)
+, fPreprocess(false)
 {}
 
 PictureBenchmark::~PictureBenchmark() {
@@ -77,9 +78,22 @@
 
     // We throw this away to remove first time effects (such as paging in this program)
     fRenderer->setup();
+
+    if (fPreprocess) {
+        if (NULL != fRenderer->getCanvas()) {
+            fRenderer->getCanvas()->EXPERIMENTAL_optimize(pict);
+        }
+    }
+
     fRenderer->render(NULL);
     fRenderer->resetState(true);   // flush, swapBuffers and Finish
 
+    if (fPreprocess) {
+        if (NULL != fRenderer->getCanvas()) {
+            fRenderer->getCanvas()->EXPERIMENTAL_purge(pict);
+        }
+    }
+
     if (fPurgeDecodedTex) {
         fRenderer->purgeTextures();
     }
@@ -216,6 +230,12 @@
 
                 SkAssertResult(perRunTimerData.appendTimes(perRunTimer.get()));
 
+                if (fPreprocess) {
+                    if (NULL != fRenderer->getCanvas()) {
+                        fRenderer->getCanvas()->EXPERIMENTAL_purge(pict);
+                    }
+                }
+
                 if (fPurgeDecodedTex) {
                     fRenderer->purgeTextures();
                 }