https://bugs.webkit.org/show_bug.cgi?id=63502

Patch by Eunmi Lee <eunmi15.lee@samsung.com> on 2011-09-25
Reviewed by Martin Robinson.

The gtk/GtkWidgetBackingStoreCairo.cpp is moved to the cairo/WidgetBackingStoreCairo.cpp and
some codes for EFL are added.
WidgetBackingStoreCairo creates cairo_image_surface and has a role to copy reusable area
when scrolling. So, it will be used in the WebKit2 EFL port's BackingStore.

* CMakeListsEfl.txt:
* GNUmakefile.list.am:
* platform/cairo/WidgetBackingStore.h:
* platform/cairo/WidgetBackingStoreCairo.cpp: Renamed from Source/WebCore/platform/gtk/GtkWidgetBackingStoreCairo.cpp.
(WebCore::createSurfaceForBackingStore):
(WebCore::WidgetBackingStorePrivate::create):
(WebCore::WidgetBackingStorePrivate::WidgetBackingStorePrivate):
(WebCore::WidgetBackingStore::create):
(WebCore::WidgetBackingStore::WidgetBackingStore):
(WebCore::WidgetBackingStore::~WidgetBackingStore):
(WebCore::WidgetBackingStore::cairoSurface):
(WebCore::WidgetBackingStore::scroll):
* platform/gtk/GtkWidgetBackingStoreX11.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@95935 268f45cc-cd09-0410-ab3c-d52691b4dbfc