Fix wrong initialization of renderer_initiated_creation parameter.

chrome/browser/background/background_contents.cc

Index: chrome/browser/background/background_contents.cc
diff --git a/chrome/browser/background/background_contents.cc b/chrome/browser/background/background_contents.cc
index 258faf3c4eb6ff3bd28d3ac2a147f9c6c4e4bf75..6b02c78a44190ef227f0d969f3f2cacd2514b52f 100644
--- a/chrome/browser/background/background_contents.cc
+++ b/chrome/browser/background/background_contents.cc
@@ -44,7 +44,7 @@ BackgroundContents::BackgroundContents(
   WebContents::CreateParams create_params(profile_, site_instance);
   create_params.routing_id = routing_id;
   create_params.main_frame_routing_id = main_frame_routing_id;
-  create_params.renderer_initiated_creation = true;
+  create_params.renderer_initiated_creation = routing_id != MSG_ROUTING_NONE;

[ncarter (slow), 2015/06/05 21:47:50]

What are the (non-test) implications of this fix?

The new code does seem to be the right thing to do, but I am curious -- how did
things behave without the fix? Was there a bogus WebContentsObserver call if
routing_id was MSG_ROUTING_NONE, or was it worse, like no RenderView was ever
actually created? 

[lfg, 2015/06/05 22:07:06]

In practice, the only issue is that we call the Render{Frame,View}Created
observer callbacks before the process exists. The reason this doesn't cause
other problems is because it's not possible to listen to the very first
RenderView/Frame created message because it's sent too early during the creation
of the WebContents, and we can't attach the observer that early in the process.

What ends up happening is that right after the creation, during the first
navigation, we create/initialize the RenderFrame/View here (since the process
doesn't exist, IsRenderFrameLive returns false):
https://code.google.com/p/chromium/codesearch#chromium/src/content/browser/fr...

[ncarter (slow), 2015/06/05 22:12:08]

Thanks for clarifying. Please update the commit message with a summary of this
situation.

   if (session_storage_namespace) {
     content::SessionStorageNamespaceMap session_storage_namespace_map;
     session_storage_namespace_map.insert(