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..3b94a731ce9aaa60e7bcbd01679cbb02043342da 100644
--- a/chrome/test/base/interactive_test_utils.h
+++ b/chrome/test/base/interactive_test_utils.h
@@ -8,10 +8,7 @@
 #include "chrome/browser/ui/view_ids.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "ui/base/test/ui_controls.h"
-
-namespace gfx {
-class Point;
-}
+#include "ui/gfx/geometry/point.h"
 
 #if defined(TOOLKIT_VIEWS)
 namespace views {
@@ -21,6 +18,46 @@ class View;
 
 namespace ui_test_utils {
 
+#if defined(OS_MACOSX)
+// Moves the mouse to the |from| position, presses left mouse button,
+// then moves mouse to the |to| position and 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, int steps = 1);

[tapted, 2016/06/01 11:29:55]

nit: move below DragAndDropSequnce (it's usually nice to have types/class
declarations ordered first in any scope)

[themblsha, 2016/06/03 17:42:07]

Done.

+
+// Represents an operation in a sequence of simulated drag and drop events
+// executed asynchronously by DragAndDropSequence.
+class DragAndDropOperation {
+ public:
+  enum class Type {
+    Move,
+    MouseDown,
+    MouseUp
+  };
+
+  static DragAndDropOperation Move(const gfx::Point& p);
+  static DragAndDropOperation MouseDown();
+  static DragAndDropOperation MouseUp();
+
+  Type type() const { return type_; }
+  const gfx::Point& point() const { return point_; }
+
+ private:
+  DragAndDropOperation(Type type, const gfx::Point& p)
+      : type_(type), point_(p) {}
+
+  Type type_;
+  gfx::Point point_;
+};
+
+// Performs a series of drag and drop operations while spinning a RunLoop on the
+// main thread. If there are nested eventloops on the main thread's queue, our

[tapted, 2016/06/01 11:29:55]

I don't think we need the sentence "If there are nested eventloops...stuck." 

[themblsha, 2016/06/03 17:42:07]

Done.

+// helper RunLoop won't quit and we'll get stuck.
+// BridgedNativeWidget::RunMoveLoop() creates a RunLoop, so we need to ensure
+// that sequence is finished before trying to return from the function.
+void DragAndDropSequence(const std::list<DragAndDropOperation>& operations);
+#endif  // OS_MACOSX
+
 // Brings the native window for |browser| to the foreground. Returns true on
 // success.
 bool BringBrowserWindowToFront(const Browser* browser) WARN_UNUSED_RESULT;