Prepare ui/ module for compilation with OS X 10.7 deployment target.

ui/base/cocoa/cocoa_base_utils.h

Index: ui/base/cocoa/cocoa_base_utils.h
diff --git a/ui/base/cocoa/cocoa_base_utils.h b/ui/base/cocoa/cocoa_base_utils.h
index c479f72f2a5ea0dc7b50ce076826f545f958beb8..627fe3ba325c3fa062a8e74bfc557bd1c8005d13 100644
--- a/ui/base/cocoa/cocoa_base_utils.h
+++ b/ui/base/cocoa/cocoa_base_utils.h
@@ -26,6 +26,14 @@ UI_BASE_EXPORT WindowOpenDisposition
 UI_BASE_EXPORT WindowOpenDisposition
     WindowOpenDispositionFromNSEventWithFlags(NSEvent* event, NSUInteger flags);
 
+// Converts a point from window coordinates to screen coordinates.
+UI_BASE_EXPORT NSPoint ConvertPointFromWindowToScreen(NSWindow* window,
+                                                      NSPoint point);
+
+// Converts a point from screen coordinates to window coordinates.
+UI_BASE_EXPORT NSPoint ConvertPointFromScreenToWindow(NSWindow* window,
+                                                      NSPoint point);
+
 }  // namespace ui
 
 #endif  // UI_BASE_COCOA_COCOA_BASE_UTILS_H_