Introduce EventProcessor::OnEventProcessingStarted()

ui/aura/window_event_dispatcher_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/window_event_dispatcher.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/run_loop.h"
@@ skipping 656 matching lines @@
 
   // Check that we do dispatch the held MOUSE_DRAGGED event before another type
   // of event.
   ui::MouseEvent mouse_pressed_event(ui::ET_MOUSE_PRESSED, gfx::Point(0, 0),
                                      gfx::Point(0, 0), 0, 0);
   DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
   EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
             EventTypesToString(recorder.events()));
   recorder.Reset();
 
-  // Check that we coalesce held MOUSE_DRAGGED events.
+  // Check that we coalesce held MOUSE_DRAGGED events. Note that here (and
+  // elsewhere in this test) we re-define each event prior to dispatch so that
+  // it has the correct state (phase, handled, target, etc.).
+  mouse_dragged_event = ui::MouseEvent(
+      ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0), 0, 0);
   ui::MouseEvent mouse_dragged_event2(ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10),
                                       gfx::Point(10, 10), 0, 0);
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
   EXPECT_TRUE(recorder.events().empty());
+  mouse_pressed_event = ui::MouseEvent(
+      ui::ET_MOUSE_PRESSED, gfx::Point(0, 0), gfx::Point(0, 0), 0, 0);
   DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
   EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
             EventTypesToString(recorder.events()));
   recorder.Reset();
 
   // Check that on ReleasePointerMoves, held events are not dispatched
   // immediately, but posted instead.
+  mouse_dragged_event = ui::MouseEvent(
+      ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0), 0, 0);
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
   host()->dispatcher()->ReleasePointerMoves();
   EXPECT_TRUE(recorder.events().empty());
   RunAllPendingInMessageLoop();
   EXPECT_EQ("MOUSE_DRAGGED", EventTypesToString(recorder.events()));
   recorder.Reset();
 
   // However if another message comes in before the dispatch of the posted
   // event, check that the posted event is dispatched before this new event.
   host()->dispatcher()->HoldPointerMoves();
+  mouse_dragged_event = ui::MouseEvent(
+      ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0), 0, 0);
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
   host()->dispatcher()->ReleasePointerMoves();
+  mouse_pressed_event = ui::MouseEvent(
+      ui::ET_MOUSE_PRESSED, gfx::Point(0, 0), gfx::Point(0, 0), 0, 0);
   DispatchEventUsingWindowDispatcher(&mouse_pressed_event);
   EXPECT_EQ("MOUSE_DRAGGED MOUSE_PRESSED",
             EventTypesToString(recorder.events()));
   recorder.Reset();
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(recorder.events().empty());
 
   // Check that if the other message is another MOUSE_DRAGGED, we still coalesce
   // them.
   host()->dispatcher()->HoldPointerMoves();
+  mouse_dragged_event = ui::MouseEvent(
+      ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0), 0, 0);
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
   host()->dispatcher()->ReleasePointerMoves();
+  mouse_dragged_event2 = ui::MouseEvent(
+      ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10), gfx::Point(10, 10), 0, 0);
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
   EXPECT_EQ("MOUSE_DRAGGED", EventTypesToString(recorder.events()));
   recorder.Reset();
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(recorder.events().empty());
 
   // Check that synthetic mouse move event has a right location when issued
   // while holding pointer moves.
+  mouse_dragged_event = ui::MouseEvent(
+      ui::ET_MOUSE_DRAGGED, gfx::Point(0, 0), gfx::Point(0, 0), 0, 0);
+  mouse_dragged_event2 = ui::MouseEvent(
+      ui::ET_MOUSE_DRAGGED, gfx::Point(10, 10), gfx::Point(10, 10), 0, 0);
   ui::MouseEvent mouse_dragged_event3(ui::ET_MOUSE_DRAGGED, gfx::Point(28, 28),
                                       gfx::Point(28, 28), 0, 0);
   host()->dispatcher()->HoldPointerMoves();
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event);
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event2);
   window->SetBounds(gfx::Rect(15, 15, 80, 80));
   DispatchEventUsingWindowDispatcher(&mouse_dragged_event3);
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(recorder.events().empty());
   host()->dispatcher()->ReleasePointerMoves();
@@ skipping 1608 matching lines @@
   ASSERT_EQ(1u, recorder.touch_locations().size());
   EXPECT_EQ(gfx::Point(kX - kWindowOffset, kY - kWindowOffset).ToString(),
             recorder.touch_locations()[0].ToString());
 
   ASSERT_EQ(2u, recorder.gesture_locations().size());
   EXPECT_EQ(gfx::Point(kX - kWindowOffset, kY - kWindowOffset).ToString(),
             recorder.gesture_locations()[0].ToString());
 }
 
 }  // namespace aura