Remove more BUILDING_ON_LEOPARD usage in PLATFORM(MAC) code

Remove more BUILDING_ON_LEOPARD usage in PLATFORM(MAC) code
https://bugs.webkit.org/show_bug.cgi?id=85846

Reviewed by Adam Barth.

PLATFORM(MAC) has not supported Leopard for several months now.
This change removes about 1/3 of the remaining BUILDING_ON_LEOPARD
uses in the PLATFORM(MAC) codepaths.  PLATFORM(CHROMIUM) still
supports BUILDING_ON_LEOPARD for now.

Source/WebCore:

* WebCore.exp.in:
* dom/Document.cpp:
(WebCore::Document::updateRangesAfterChildrenChanged):
(WebCore::Document::nodeChildrenWillBeRemoved):
(WebCore::Document::nodeWillBeRemoved):
(WebCore::Document::textInserted):
(WebCore::Document::textRemoved):
(WebCore::Document::textNodesMerged):
(WebCore::Document::textNodeSplit):
* editing/Editor.cpp:
(WebCore::Editor::respondToChangedSelection):
* editing/TypingCommand.cpp:
(WebCore::TypingCommand::markMisspellingsAfterTyping):
(WebCore::TypingCommand::typingAddedToOpenCommand):
* editing/mac/EditorMac.mm:
(WebCore::Editor::pasteWithPasteboard):
* loader/EmptyClients.h:
(EmptyEditorClient):
* page/ContextMenuController.cpp:
(WebCore::ContextMenuController::contextMenuItemSelected):
(WebCore::ContextMenuController::createAndAppendSpellingAndGrammarSubMenu):
(WebCore):
(WebCore::ContextMenuController::populate):
(WebCore::ContextMenuController::checkOrEnableIfNeeded):
* page/EditorClient.h:
(EditorClient):
* platform/LocalizedStrings.cpp:
(WebCore::contextMenuItemTagSearchWeb):
* platform/MemoryPressureHandler.cpp:
(WebCore):
* platform/SuddenTermination.h:
(WebCore):
* platform/graphics/ca/GraphicsLayerCA.cpp:
(WebCore::GraphicsLayerCA::updateContentsImage):
(WebCore::GraphicsLayerCA::constrainedSize):
* platform/graphics/ca/PlatformCALayer.h:
(PlatformCALayer):
* platform/graphics/ca/mac/PlatformCAAnimationMac.mm:
(fromCAValueFunctionType):
(PlatformCAAnimation::valueFunction):
(PlatformCAAnimation::setValueFunction):
* platform/graphics/ca/mac/PlatformCALayerMac.mm:
(toCAFilterType):
(PlatformCALayer::anchorPoint):
(PlatformCALayer::setAnchorPoint):
(PlatformCALayer::contentsTransform):
(PlatformCALayer::setContentsTransform):
(PlatformCALayer::isGeometryFlipped):
(PlatformCALayer::setGeometryFlipped):
(PlatformCALayer::acceleratesDrawing):
(PlatformCALayer::setAcceleratesDrawing):
(PlatformCALayer::setMinificationFilter):
(PlatformCALayer::setMagnificationFilter):
(PlatformCALayer::contentsScale):
(PlatformCALayer::setContentsScale):
* platform/graphics/ca/mac/TileCache.mm:
(WebCore::TileCache::setScale):
(WebCore::TileCache::setAcceleratesDrawing):
(WebCore::TileCache::createTileLayer):

Source/WTF:

* wtf/Platform.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121524 268f45cc-cd09-0410-ab3c-d52691b4dbfc