Move context-related callbacks into OutputSurface

cc/output/delegating_renderer.cc

Index: cc/output/delegating_renderer.cc
diff --git a/cc/output/delegating_renderer.cc b/cc/output/delegating_renderer.cc
index 313093a2cf1545945d65e5c1ec9da858eb889c04..49940dbf214f610407a83ce265ab0d505e37b05e 100644
--- a/cc/output/delegating_renderer.cc
+++ b/cc/output/delegating_renderer.cc
@@ -70,7 +70,6 @@ bool DelegatingRenderer::Initialize() {
   if (!context3d->makeContextCurrent())
     return false;
 
-  context3d->setContextLostCallback(this);
   context3d->pushGroupMarkerEXT("CompositorContext");
 
   std::string extensionsString =
@@ -121,11 +120,7 @@ bool DelegatingRenderer::Initialize() {
   return true;
 }
 
-DelegatingRenderer::~DelegatingRenderer() {
-  WebGraphicsContext3D* context3d = resource_provider_->GraphicsContext3D();
-  if (context3d)
-    context3d->setContextLostCallback(NULL);
-}
+DelegatingRenderer::~DelegatingRenderer() {}
 
 const RendererCapabilities& DelegatingRenderer::Capabilities() const {
   return capabilities_;
@@ -176,8 +171,6 @@ void DelegatingRenderer::GetFramebufferPixels(void* pixels, gfx::Rect rect) {
 void DelegatingRenderer::ReceiveCompositorFrameAck(
     const CompositorFrameAck& ack) {
   resource_provider_->ReceiveFromParent(ack.resources);
-  if (client_->HasImplThread())
-    client_->OnSwapBuffersComplete();
 }
 
 
@@ -192,8 +185,4 @@ void DelegatingRenderer::SetVisible(bool visible) {
   visible_ = visible;
 }
 
-void DelegatingRenderer::onContextLost() {
-  client_->DidLoseOutputSurface();
-}
-
 }  // namespace cc