Rename OS(DARWIN) to OS(MACOSX).

Source/web/ContextMenuClientImpl.cpp

Index: Source/web/ContextMenuClientImpl.cpp
diff --git a/Source/web/ContextMenuClientImpl.cpp b/Source/web/ContextMenuClientImpl.cpp
index 822f491ed7ac6f5643817017a6462a3f19cfbf6b..c634e356c4bd7495a7dc247575dcc25ece3827ed 100644
--- a/Source/web/ContextMenuClientImpl.cpp
+++ b/Source/web/ContextMenuClientImpl.cpp
@@ -133,7 +133,7 @@ static String selectMisspelledWord(Frame* selectedFrame)
     WebFrameImpl::selectWordAroundPosition(selectedFrame, pos);
     misspelledWord = selectedFrame->selectedText().stripWhiteSpace();
 
-#if OS(DARWIN)
+#if OS(MACOSX)
     // If misspelled word is still empty, then that portion should not be
     // selected. Set the selection to that position only, and do not expand.
     if (misspelledWord.isEmpty())
@@ -345,12 +345,12 @@ void ContextMenuClientImpl::showContextMenu(const WebCore::ContextMenu* defaultM
         }
     }
 
-#if OS(DARWIN)
+#if OS(MACOSX)
     if (selectedFrame->editor().selectionHasStyle(CSSPropertyDirection, "ltr") != FalseTriState)
         data.writingDirectionLeftToRight |= WebContextMenuData::CheckableMenuItemChecked;
     if (selectedFrame->editor().selectionHasStyle(CSSPropertyDirection, "rtl") != FalseTriState)
         data.writingDirectionRightToLeft |= WebContextMenuData::CheckableMenuItemChecked;
-#endif // OS(DARWIN)
+#endif // OS(MACOSX)
 
     // Now retrieve the security info.
     DocumentLoader* dl = selectedFrame->loader()->documentLoader();