Associate an id with the output surface to handle lost contexts

content/renderer/gpu/delegated_compositor_output_surface.cc

Index: content/renderer/gpu/delegated_compositor_output_surface.cc
diff --git a/content/renderer/gpu/delegated_compositor_output_surface.cc b/content/renderer/gpu/delegated_compositor_output_surface.cc
index f6949ebc465f0c48fb845f194d795c6f7bb90f24..2e53923de14820b7527617260789f72daa20feae 100644
--- a/content/renderer/gpu/delegated_compositor_output_surface.cc
+++ b/content/renderer/gpu/delegated_compositor_output_surface.cc
@@ -8,9 +8,14 @@ namespace content {
 
 DelegatedCompositorOutputSurface::DelegatedCompositorOutputSurface(
     int32 routing_id,
+    uint32 output_surface_id,
     WebGraphicsContext3DCommandBufferImpl* context3d,
     cc::SoftwareOutputDevice* software)
-    : CompositorOutputSurface(routing_id, context3d, software, true) {
+    : CompositorOutputSurface(routing_id,
+                              output_surface_id,
+                              context3d,
+                              software,
+                              true) {
   capabilities_.delegated_rendering = true;
   capabilities_.max_frames_pending = 1;
 }