Add machinery for dumping SkPictures to disk

sky/shell/gpu/rasterizer.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sky/shell/gpu/rasterizer.h"
 
 #include "base/trace_event/trace_event.h"
 #include "sky/shell/gpu/ganesh_context.h"
 #include "sky/shell/gpu/ganesh_surface.h"
+#include "sky/shell/gpu/picture_serializer.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_share_group.h"
 #include "ui/gl/gl_surface.h"
 
 namespace sky {
 namespace shell {
 namespace {
@@ skipping 31 matching lines @@
   gfx::Size size = GetSize(picture.get());
   if (size.IsEmpty())
     return;
 
   EnsureGLContext();
   CHECK(context_->MakeCurrent(surface_.get()));
   EnsureGaneshSurface(surface_->GetBackingFrameBufferObject(), size);
 
   DrawPicture(picture.get());
   surface_->SwapBuffers();
+
+  // SerializePicture("/data/data/org.domokit.sky.demo/cache/layer0.skp", picture.get());
 }
 
 void Rasterizer::DrawPicture(SkPicture* picture) {
   TRACE_EVENT0("sky", "Rasterizer::DrawPicture");
   SkCanvas* canvas = ganesh_surface_->canvas();
   canvas->drawPicture(picture);
   canvas->flush();
 }
 
 void Rasterizer::OnOutputSurfaceDestroyed() {
@@ skipping 16 matching lines @@
 
 void Rasterizer::EnsureGaneshSurface(intptr_t window_fbo,
                                      const gfx::Size& size) {
   if (!ganesh_surface_ || ganesh_surface_->size() != size)
     ganesh_surface_.reset(
       new GaneshSurface(window_fbo, ganesh_context_.get(), size));
 }
 
 }  // namespace shell
 }  // namespace sky