MacViews: Implement Tab Dragging

chrome/test/base/interactive_test_utils.h

Index: chrome/test/base/interactive_test_utils.h
diff --git a/chrome/test/base/interactive_test_utils.h b/chrome/test/base/interactive_test_utils.h
index f0ccc770f2a8cfae8ca6437cdfc83364527badf7..49fddc9273491e6475c096b39c74046afbc9a277 100644
--- a/chrome/test/base/interactive_test_utils.h
+++ b/chrome/test/base/interactive_test_utils.h
@@ -21,6 +21,16 @@ class View;
 
 namespace ui_test_utils {
 
+// Moves the mouse to the |from| position, presses left mouse button,
+// then moves mouse to the |to| position, waits the |delay|, releases left mouse
+// button.
+// |steps| indicates number of intermediate points that are interpolated between
+// |from| and |to|.
+void DragAndDrop(const gfx::Point& from,
+                 const gfx::Point& to,
+                 base::TimeDelta delay = base::TimeDelta(),
+                 unsigned int steps = 1);
+
 // Brings the native window for |browser| to the foreground. Returns true on
 // success.
 bool BringBrowserWindowToFront(const Browser* browser) WARN_UNUSED_RESULT;