Adding proper dragging behavior for L/R maximized windows.

ash/wm/workspace/workspace_window_resizer_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 "ash/wm/workspace/workspace_window_resizer.h"
 
 #include "ash/display/mouse_cursor_event_filter.h"
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 886 matching lines @@
   scoped_ptr<WorkspaceWindowResizer> resizer(WorkspaceWindowResizer::Create(
       window_.get(), gfx::Point(), HTCAPTION, empty_windows()));
   ASSERT_TRUE(resizer.get());
   // Ctrl + drag the window to new poistion by adding (10, 12) to its origin,
   // the window should move to the exact position.
   resizer->Drag(CalculateDragPoint(*resizer, 10, 12), 0);
   resizer->CompleteDrag(ui::EF_CONTROL_DOWN);
   EXPECT_EQ("106,124 320x160", window_->bounds().ToString());
 }
 
+// Verifies that a dragged window will restore to its pre-maximized size.
+TEST_F(WorkspaceWindowResizerTest, RestoreToPreMaximizeCoordinates) {

[sky, 2012/09/07 02:43:30]

Add coverage of the revert case

[Mr4D (OOO till 08-26), 2012/09/08 01:17:41]

Done.

+  window_->SetBounds(gfx::Rect(0, 0, 1000, 1000));
+  SetRestoreBoundsInScreen(window_.get(), gfx::Rect(96, 112, 320, 160));
+  scoped_ptr<WorkspaceWindowResizer> resizer(WorkspaceWindowResizer::Create(
+      window_.get(), gfx::Point(), HTCAPTION, empty_windows()));
+  SetGridSize(1);
+  ASSERT_TRUE(resizer.get());
+  // Drag the window to new poistion by adding (180, 12) to original point,
+  // the window should get restored and centered around cursor.
+  resizer->Drag(CalculateDragPoint(*resizer, 180, 12), 0);
+  resizer->CompleteDrag(0);
+  EXPECT_EQ("20,16 320x160", window_->bounds().ToString());
+  // The restore rectangle should get cleared as well.
+  EXPECT_EQ(NULL, GetRestoreBoundsInScreen(window_.get()));
+}
+
 }  // namespace internal
 }  // namespace ash