[CSS Grid Layout] Remove unused variable in fast/css-grid-layout/implicit-position-dynamic-change.html
https://bugs.webkit.org/show_bug.cgi?id=130833

Reviewed by Sergio Villar Senin.

* fast/css-grid-layout/implicit-position-dynamic-change.html: Inside
method updateImplicitGridColumn() we define a variable gridItem that
is not used. This patch removes it.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@166356 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Remove LayerTreeContextCairo.cpp
https://bugs.webkit.org/show_bug.cgi?id=130807

Reviewed by Martin Robinson.

* Shared/cairo/LayerTreeContextCairo.cpp: Removed.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@166357 268f45cc-cd09-0410-ab3c-d52691b4dbfc
AX: Returns const reference to static string.
https://bugs.webkit.org/show_bug.cgi?id=130835

Reviewed by Mario Sanchez Prada.

Avoiding some unnecessary copies by returning const reference to static string.

No new tests. No behaviour change.

* accessibility/AccessibilityMediaControls.cpp:
(WebCore::AccessibilityMediaControl::controlTypeName):
(WebCore::AccessibilityMediaControlsContainer::elementTypeName):
* accessibility/AccessibilityMediaControls.h:

Change-Id: I05357d107c0df944a65c7fb97c8bbdec549202c4

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@166358 268f45cc-cd09-0410-ab3c-d52691b4dbfc