Don't synthesize mousemove events if the mouse cursor is not on the widget

ui/views/widget/widget_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 <algorithm>
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 1679 matching lines @@
   EXPECT_EQ(0, h1.GetEventCount(ui::ET_MOUSEWHEEL));
   EXPECT_EQ(0, view->GetEventCount(ui::ET_MOUSEWHEEL));
   EXPECT_EQ(0, h2.GetEventCount(ui::ET_MOUSEWHEEL));
 
   widget->CloseNow();
 }
 
 TEST_F(WidgetTest, SynthesizeMouseMoveEvent) {
   Widget* widget = CreateTopLevelNativeWidget();
   View* root_view = widget->GetRootView();
+  root_view->SetBoundsRect(gfx::Rect(0, 0, 500, 500));
 
   EventCountView* v1 = new EventCountView();
   v1->SetBounds(0, 0, 10, 10);
   root_view->AddChildView(v1);
   EventCountView* v2 = new EventCountView();
   v2->SetBounds(0, 10, 10, 10);
   root_view->AddChildView(v2);
 
+  // SynthesizeMouseMoveEvent does nothing until the mouse is entered.
+  widget->SynthesizeMouseMoveEvent();
+  EXPECT_EQ(0, v1->GetEventCount(ui::ET_MOUSE_MOVED));
+  EXPECT_EQ(0, v2->GetEventCount(ui::ET_MOUSE_MOVED));
+
   gfx::Point cursor_location(5, 5);
+  ui::MouseEvent enter(ui::ET_MOUSE_ENTERED, cursor_location, cursor_location,
+                       ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
+  widget->OnMouseEvent(&enter);
+
   ui::MouseEvent move(ui::ET_MOUSE_MOVED, cursor_location, cursor_location,
                       ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
   widget->OnMouseEvent(&move);
 
   EXPECT_EQ(1, v1->GetEventCount(ui::ET_MOUSE_ENTERED));
+  EXPECT_EQ(1, v1->GetEventCount(ui::ET_MOUSE_MOVED));
   EXPECT_EQ(0, v2->GetEventCount(ui::ET_MOUSE_ENTERED));
+  EXPECT_EQ(0, v2->GetEventCount(ui::ET_MOUSE_MOVED));
+
+  // SynthesizeMouseMoveEvent dispatches an mousemove event.
+  widget->SynthesizeMouseMoveEvent();
+  EXPECT_EQ(2, v1->GetEventCount(ui::ET_MOUSE_MOVED));
 
   delete v1;
   v2->SetBounds(0, 0, 10, 10);
   EXPECT_EQ(0, v2->GetEventCount(ui::ET_MOUSE_ENTERED));
 
   widget->SynthesizeMouseMoveEvent();
   EXPECT_EQ(1, v2->GetEventCount(ui::ET_MOUSE_ENTERED));
 
   widget->CloseNow();
 }
@@ skipping 1516 matching lines @@
   EXPECT_FALSE(widget->IsAlwaysOnTop());
   widget->SetAlwaysOnTop(true);
   EXPECT_TRUE(widget->IsAlwaysOnTop());
   widget->SetAlwaysOnTop(false);
   EXPECT_FALSE(widget->IsAlwaysOnTop());
   widget->CloseNow();
 }
 
 }  // namespace test
 }  // namespace views