Add more trace events to Sky

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 "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 {
@@ skipping 17 matching lines @@
 base::WeakPtr<Rasterizer> Rasterizer::GetWeakPtr() {
   return weak_factory_.GetWeakPtr();
 }
 
 void Rasterizer::OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) {
   surface_ = gfx::GLSurface::CreateViewGLSurface(widget);
   CHECK(surface_) << "GLSurface required.";
 }
 
 void Rasterizer::Draw(skia::RefPtr<SkPicture> picture) {
+  TRACE_EVENT0("sky", "Rasterizer::Draw");
+
   if (!surface_)
     return;
 
   gfx::Size size = GetSize(picture.get());
   if (size.IsEmpty())
     return;
 
   EnsureGLContext();
   CHECK(context_->MakeCurrent(surface_.get()));
   EnsureGaneshSurface(size);
 
-  SkCanvas* canvas = ganesh_surface_->canvas();
-  canvas->drawPicture(picture.get());
-  canvas->flush();
-
+  DrawPicture(picture.get());
   surface_->SwapBuffers();
 }
 
+void Rasterizer::DrawPicture(SkPicture* picture) {
+  TRACE_EVENT0("sky", "Rasterizer::DrawPicture");
+  SkCanvas* canvas = ganesh_surface_->canvas();
+  canvas->drawPicture(picture);
+  canvas->flush();
+}
+
 void Rasterizer::OnOutputSurfaceDestroyed() {
   ganesh_surface_.reset();
   ganesh_context_.reset();
   context_ = nullptr;
   surface_ = nullptr;
 }
 
 void Rasterizer::EnsureGLContext() {
   if (context_)
     return;
   context_ = gfx::GLContext::CreateGLContext(share_group_.get(), surface_.get(),
                                              gfx::PreferIntegratedGpu);
   CHECK(context_) << "GLContext required.";
   CHECK(context_->MakeCurrent(surface_.get()));
   ganesh_context_.reset(new GaneshContext(context_.get()));
 }
 
 void Rasterizer::EnsureGaneshSurface(const gfx::Size& size) {
   if (!ganesh_surface_ || ganesh_surface_->size() != size)
     ganesh_surface_.reset(new GaneshSurface(ganesh_context_.get(), size));
 }
 
 }  // namespace shell
 }  // namespace sky