Changes MouseEvent constructor to take changed_button_flags.

ui/aura/test/event_generator.cc

Index: ui/aura/test/event_generator.cc
diff --git a/ui/aura/test/event_generator.cc b/ui/aura/test/event_generator.cc
index f11ab214f069553e7015bd166c8f5cd8b18de2d4..7625a11f726ed8fccdb2837983280c8770ad7d4f 100644
--- a/ui/aura/test/event_generator.cc
+++ b/ui/aura/test/event_generator.cc
@@ -150,14 +150,14 @@ void EventGenerator::SendMouseExit() {
   gfx::Point exit_location(current_location_);
   ConvertPointToTarget(current_root_window_->window(), &exit_location);
   ui::MouseEvent mouseev(ui::ET_MOUSE_EXITED, exit_location, exit_location,
-                         flags_);
+                         flags_, 0);
   Dispatch(&mouseev);
 }
 
 void EventGenerator::MoveMouseToInHost(const gfx::Point& point_in_host) {
   const ui::EventType event_type = (flags_ & ui::EF_LEFT_MOUSE_BUTTON) ?
       ui::ET_MOUSE_DRAGGED : ui::ET_MOUSE_MOVED;
-  ui::MouseEvent mouseev(event_type, point_in_host, point_in_host, flags_);
+  ui::MouseEvent mouseev(event_type, point_in_host, point_in_host, flags_, 0);
   Dispatch(&mouseev);
 
   current_location_ = point_in_host;
@@ -178,7 +178,7 @@ void EventGenerator::MoveMouseTo(const gfx::Point& point_in_screen,
     if (!grab_)
       UpdateCurrentRootWindow(move_point);
     ConvertPointToTarget(current_root_window_->window(), &move_point);
-    ui::MouseEvent mouseev(event_type, move_point, move_point, flags_);
+    ui::MouseEvent mouseev(event_type, move_point, move_point, flags_, 0);
     Dispatch(&mouseev);
   }
   current_location_ = point_in_screen;
@@ -511,7 +511,8 @@ void EventGenerator::PressButton(int flag) {
     flags_ |= flag;
     grab_ = flags_ & kAllButtonMask;
     gfx::Point location = GetLocationInCurrentRoot();
-    ui::MouseEvent mouseev(ui::ET_MOUSE_PRESSED, location, location, flags_);
+    ui::MouseEvent mouseev(ui::ET_MOUSE_PRESSED, location, location, flags_,
+                           flag);
     Dispatch(&mouseev);
   }
 }
@@ -520,7 +521,7 @@ void EventGenerator::ReleaseButton(int flag) {
   if (flags_ & flag) {
     gfx::Point location = GetLocationInCurrentRoot();
     ui::MouseEvent mouseev(ui::ET_MOUSE_RELEASED, location,
-                           location, flags_);
+                           location, flags_, flag);
     Dispatch(&mouseev);
     flags_ ^= flag;
   }