Refactoring: get rid of the SkBenchmark void* parameter.

While I was doing massive sed-ing, I also converted every bench to use DEF_BENCH instead of registering the ugly manual way.

BUG=
R=scroggo@google.com

Review URL: https://codereview.chromium.org/23876006

git-svn-id: http://skia.googlecode.com/svn/trunk@11263 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/SkBenchmark.cpp b/bench/SkBenchmark.cpp
index 09e109e..4d361e7 100644
--- a/bench/SkBenchmark.cpp
+++ b/bench/SkBenchmark.cpp
@@ -15,7 +15,7 @@
 
 template BenchRegistry* BenchRegistry::gHead;
 
-SkBenchmark::SkBenchmark(void* /*ignored*/) {
+SkBenchmark::SkBenchmark() {
     fForceAlpha = 0xFF;
     fForceAA = true;
     fDither = SkTriState::kDefault;