Fix FIXME in findPreviousAndNextAttributes in RenderSVGText.cpp

Use the existing pre-order traversal methods on RenderObject to implement
the traversal in an iterative fashion instead of as a recursion.

This allows moving the |stopAfterNext| boolean to the scope of
findPreviousAndNextAttributes, so do that and fix up the callers.

BUG=

Review URL: https://codereview.chromium.org/141703017

git-svn-id: svn://svn.chromium.org/blink/trunk@165950 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: rollout r165941 for breaking layout tests.

TBR=dgozman

Review URL: https://codereview.chromium.org/142343003

git-svn-id: svn://svn.chromium.org/blink/trunk@165951 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: mark inspector/extensions/extensions-sidebar.html as failing for now

BUG=338752
TBR=dgozman

Review URL: https://codereview.chromium.org/136643003

git-svn-id: svn://svn.chromium.org/blink/trunk@165952 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove Entity interface

Intent to Remove:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/k3tZGP2EANc

BUG=338602

Review URL: https://codereview.chromium.org/143673005

git-svn-id: svn://svn.chromium.org/blink/trunk@165953 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Tweak/widen NPAPI test expectations.

TBR=gavinp
BUG=

Review URL: https://codereview.chromium.org/133213005

git-svn-id: svn://svn.chromium.org/blink/trunk@165954 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert 165846 "Build HTMLFormElement::m_associatedElements lazily"

> Build HTMLFormElement::m_associatedElements lazily
> 
> HTMLFormElement::associate() and disassociate() don't update
> m_associatedElements synchronously, and we build it by traversing a DOM tree on
> demand.
> 
> The code becomes simpler and we don't need complex functions like
> formElementIndexWithFormAttribute and formElementIndex any more.
> 
> BUG=334556
> TEST=none; no user-visible behavior changes.
> 
> Review URL: https://codereview.chromium.org/145353004

Suspected of causing issue 338764.

TBR=tkent@chromium.org

Review URL: https://codereview.chromium.org/148973002

git-svn-id: svn://svn.chromium.org/blink/trunk@165955 bbb929c8-8fbe-4397-9dbb-9b2b20218538