Bug 461199 (Part 30) - Fixes invalidation issues when changing the href attribute. r=bz

Bug 461199 (Part 29) - Fix dom tests. r=sicking

Bug 542632 - Protect nsGenericHTMLElement::GetHrefURIForAnchors Also makes DNS prefetching take mozilla::dom::Link instead of nsIContent. r=bz

Bug 542592 - Change how we use/store nsDocument::mLinkMap This makes changes nsDocument::mLinkMap in a number of ways: 1) renamed to mStyledLinks to better reflect its new nature. 2) change it to an nsTHashtable of Link*. It no longer has a strong reference 3) add some assertions to make sure we call ForgetLink and AddStyleRelevantLink in pairs. This also makes mozilla::dom::Link::ResetLinkState take a boolean indicating if we should notify or not. r=bz

Bug 461199 (Part 27) - Fix test_visited_pref.html so it passes with the new async isVisited API r?dbaron

Bug 461199 (Part 26) - Update content tests to work with the new async isVisited API

Bug 461199 (Part 28) - Tell the document that we are a style relevant link Adds the needed calls to inform the document if we are a style relevant link, and when we no longer are. r=bz

Bug 461199 (Part 25) - Fix layout reftests to work with the new async isVisited API r=jwatt

Bug 461199 (Part 24) - Update docshell tests to work with the new async isVisited API r=bz

Bug 461199 (Part 23) - Remove no longer needed code in ns[I]Document.[cpp|h] r=bz

Bug 461199 (Part 22) - Call ResetLinkState if given eLinkState_Unknown If consumers tell mozilla::dom::Link::SetLinkState that its new state is eLinkState_Unknown, call mozilla::dom::Link::ResetLinkState and return. r=bz

Bug 461199 (Part 21) - Cache the nsIContent pointer in Link for performance reasons Add a Content method that obtains a pointer to the nsIContent interface on mozilla::dom::Link. This is cached so we only have to call QueryInterface once during the entire lifetime of the mozilla::dom::Link object. r=bz

Bug 461199 (Part 20) - Rewrite the private browsing visited link coloring test to make it work with the new async API r=mconnor r=sdwilsh r=bz

Bug 461199 (Part 19) - nsSVGAElement fails to call ResetLinkState in [Uns|S]etAttr Have nsSVGAelement implement UnsetAttr and SetAttr, and make sure it calls mozilla::dom::Link::ResetLinkState when appropriate. r=jwatt sr=bz

Bug 461199 (Part 18) - Need an observer notification to indicate when link status is known from the database Adds an observer to indicate when a URI lookup is completed and passes the visited state with the notification. This greatly simplifies test writing. r=mak

Bug 461199 (Part 17) - Remove no longer needed code from webshell and docshell. r=bz sr=sicking

Bug 461199 (Part 16) - Remove now unused style code testing for Link and HTML Links. r=bz sr=dbaron

Bug 461199 (Part 15) - Rely on nsIContent::IntrinsicState instead of nsIContent::GetLinkState in layout. Layout should call IntrinsicState instead of GetLinkState. Simplifies a lot of logic, and makes the code easier to follow. r=bz sr=dbaron

Bug 461199 (Part 14) - Implement nsIContent::IntrinsicState on mozilla::dom::Link subclasses All mozilla::dom::Link subclasses need to implement IntrinsicState and make sure to call LinkState. r=sicking sr=bz

Bug 461199 (Part 13) - mozilla::dom::Link::SetLinkState should inform the document about changes to its state when it is called. Make Link::SetLinkState notify the document about changes in state, plus a whole bunch of assertions for sanity checking. r=sicking r=bz