Move context-related callbacks into OutputSurface

cc/delegating_renderer.cc

Index: cc/delegating_renderer.cc
diff --git a/cc/delegating_renderer.cc b/cc/delegating_renderer.cc
index f36a21d4ee67799ee1c299192a70f1a19079e3a7..c69d291499276579164b6bae61ec8be27c8d6c8c 100644
--- a/cc/delegating_renderer.cc
+++ b/cc/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_;
@@ -177,11 +172,8 @@ void DelegatingRenderer::getFramebufferPixels(void *pixels,
 void DelegatingRenderer::receiveCompositorFrameAck(
     const CompositorFrameAck& ack) {
   resource_provider_->ReceiveFromParent(ack.resources);
-  if (m_client->hasImplThread())
-    m_client->onSwapBuffersComplete();
 }
 
-
 bool DelegatingRenderer::isContextLost() {
   WebGraphicsContext3D* context3d = resource_provider_->GraphicsContext3D();
   if (!context3d)
@@ -193,8 +185,4 @@ void DelegatingRenderer::setVisible(bool visible) {
   visible_ = visible;
 }
 
-void DelegatingRenderer::onContextLost() {
-  m_client->didLoseOutputSurface();
-}
-
 }  // namespace cc