Adding proper dragging behavior for L/R maximized windows.

ash/wm/workspace/workspace_window_resizer_unittest.cc

Index: ash/wm/workspace/workspace_window_resizer_unittest.cc
diff --git a/ash/wm/workspace/workspace_window_resizer_unittest.cc b/ash/wm/workspace/workspace_window_resizer_unittest.cc
index ba15148be98b73b5c7284fb0641c1ed1ea7233b1..b7eb06f8aa8ae27bc9ce4bc6c594f3ef5e476171 100644
--- a/ash/wm/workspace/workspace_window_resizer_unittest.cc
+++ b/ash/wm/workspace/workspace_window_resizer_unittest.cc
@@ -458,7 +458,6 @@ TEST_F(WorkspaceWindowResizerTest, Edge) {
     EXPECT_EQ("20,30 50x60",
               GetRestoreBoundsInScreen(window_.get())->ToString());
   }
-
   // Try the same with the right side.
   scoped_ptr<WorkspaceWindowResizer> resizer(WorkspaceWindowResizer::Create(
       window_.get(), gfx::Point(), HTCAPTION, empty_windows()));
@@ -869,5 +868,37 @@ TEST_F(WorkspaceWindowResizerTest, TestProperSizerResolutions) {
   EXPECT_EQ("0,0 640x552", rect.ToString());
 }
 
+// Verifies that a dragged window will restore to its pre-maximized size.
+TEST_F(WorkspaceWindowResizerTest, RestoreToPreMaximizeCoordinates) {
+  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()));
+  ASSERT_TRUE(resizer.get());
+  // Drag the window to new position by adding (10, 10) to original point,
+  // the window should get restored.
+  resizer->Drag(CalculateDragPoint(*resizer, 10, 10), 0);
+  resizer->CompleteDrag(0);
+  EXPECT_EQ("10,10 320x160", window_->bounds().ToString());
+  // The restore rectangle should get cleared as well.
+  EXPECT_EQ(NULL, GetRestoreBoundsInScreen(window_.get()));
+}
+
+// Verifies that a dragged window will restore to its pre-maximized size.
+TEST_F(WorkspaceWindowResizerTest, RevertResizeOperation) {
+  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()));
+  ASSERT_TRUE(resizer.get());
+  // Drag the window to new poistion by adding (180, 16) to original point,
+  // the window should get restored.
+  resizer->Drag(CalculateDragPoint(*resizer, 180, 16), 0);
+  resizer->RevertDrag();
+  EXPECT_EQ("0,0 1000x1000", window_->bounds().ToString());
+  EXPECT_EQ("96,112 320x160",
+      GetRestoreBoundsInScreen(window_.get())->ToString());
+}
+
 }  // namespace internal
 }  // namespace ash