skia expects to be initialized before it can be used. This must be done if...

skia expects to be initialized before it can be used. This must be done if serializing SkPicture, which we now do for benchmarking.
Review URL: https://chromiumcodereview.appspot.com/10823129

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150609 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/gpu/gpu_benchmarking_extension.cc

@@ -15,6 +15,7 @@
 #include "content/renderer/render_view_impl.h"
 #include "content/renderer/rendering_benchmark.h"
 #include "content/renderer/rendering_benchmark_results.h"
+#include "third_party/skia/include/core/SkGraphics.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "third_party/skia/include/core/SkStream.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebRenderingStats.h"
@@ -35,11 +36,24 @@ const char kGpuBenchmarkingExtensionName[] = "v8/GpuBenchmarking";
 
 namespace {
 
+// Always called on the main render thread.
+// Does not need to be thread-safe.
+void InitSkGraphics() {
+  static bool init = false;
+  if (!init) {
+    SkGraphics::Init();
+    init = true;
+  }
+}
+
 class SkPictureRecorder : public WebViewBenchmarkSupport::PaintClient {
  public:
   explicit SkPictureRecorder(const FilePath& dirpath)
       : dirpath_(dirpath),
         layer_id_(0) {
+    // Let skia register known effect subclasses. This basically enables
+    // reflection on those subclasses required for picture serialization.
+    InitSkGraphics();
   }
 
   virtual WebCanvas* willPaint(const WebSize& size) {