Identify service worker version at main resource load time.

content/child/request_extra_data.h

Index: content/child/request_extra_data.h
diff --git a/content/child/request_extra_data.h b/content/child/request_extra_data.h
index fb519228ee56857fedb76fba9b56e1846c2febb6..472519c74a2c6d578cf193934c4999d477c3b4a0 100644
--- a/content/child/request_extra_data.h
+++ b/content/child/request_extra_data.h
@@ -14,8 +14,9 @@
 
 namespace content {
 
-// The RenderView stores an instance of this class in the "extra data" of each
-// ResourceRequest (see RenderFrameImpl::willSendRequest).
+// The RenderView and EmbeddedWorkerContextClient store an instance of this

[jam, 2014/03/27 23:00:24]

this is also set in pepper code. i think it's best to just make this comment not
say who sets it, since it doesn't matter. something like:

"Can be set by callers of ResourceDispatchers to store extra data on every
ResourceRequest...

[michaeln, 2014/03/27 23:09:01]

Done.

+// class in the "extra data" of each ResourceRequest (see the willSendRequest
+// methods of RenderFrameImpl and EmbeddedWorkerContextClient willSendRequest).
 class CONTENT_EXPORT RequestExtraData
     : public NON_EXPORTED_BASE(blink::WebURLRequest::ExtraData) {
  public: