Dont allow the user to 'resize a window out of the workarea'

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 67f29fb2fb1c290940c0a9dc4c69c1270027e64d..4c96e57c736d9db061f821654d12941faddf16d1 100644
--- a/ash/wm/workspace/workspace_window_resizer_unittest.cc
+++ b/ash/wm/workspace/workspace_window_resizer_unittest.cc
@@ -845,6 +845,66 @@ TEST_F(WorkspaceWindowResizerTest, ResizeBottomOutsideWorkArea) {
   EXPECT_EQ("100,200 300x380", window_->bounds().ToString());
 }
 
+TEST_F(WorkspaceWindowResizerTest, ResizeWindowOutsideLeftWorkArea) {
+  Shell::GetInstance()->SetDisplayWorkAreaInsets(
+      Shell::GetPrimaryRootWindow(), gfx::Insets(0, 0, 50, 0));
+  int left = ScreenAsh::GetDisplayWorkAreaBoundsInParent(window_.get()).x();
+  int pixels_to_left_border = 50;
+  int window_width = 300;
+  int window_x = left - window_width + pixels_to_left_border;
+  window_->SetBounds(gfx::Rect(window_x, 100, window_width, 380));
+  scoped_ptr<WorkspaceWindowResizer> resizer(WorkspaceWindowResizer::Create(
+      window_.get(), gfx::Point(pixels_to_left_border, 0), HTRIGHT,
+      empty_windows()));
+  ASSERT_TRUE(resizer.get());
+  resizer->Drag(CalculateDragPoint(*resizer, -window_width, 0), 0);
+  EXPECT_EQ(base::IntToString(window_x) + ",100 " +
+            base::IntToString(WindowResizer::kMinimumOnScreenSize - window_x) +
+            "x380", window_->bounds().ToString());
+}
+
+TEST_F(WorkspaceWindowResizerTest, ResizeWindowOutsideRightWorkArea) {
+  Shell::GetInstance()->SetDisplayWorkAreaInsets(
+      Shell::GetPrimaryRootWindow(), gfx::Insets(0, 0, 50, 0));
+  int right = ScreenAsh::GetDisplayWorkAreaBoundsInParent(
+      window_.get()).right();
+  int pixels_to_right_border = 50;
+  int window_width = 300;
+  int window_x = right - pixels_to_right_border;
+  window_->SetBounds(gfx::Rect(window_x, 100, window_width, 380));
+  scoped_ptr<WorkspaceWindowResizer> resizer(WorkspaceWindowResizer::Create(
+      window_.get(), gfx::Point(window_x, 0), HTLEFT,
+      empty_windows()));
+  ASSERT_TRUE(resizer.get());
+  resizer->Drag(CalculateDragPoint(*resizer, window_width, 0), 0);
+  EXPECT_EQ(base::IntToString(right - WindowResizer::kMinimumOnScreenSize) +
+            ",100 " +
+            base::IntToString(window_width - pixels_to_right_border +
+                              WindowResizer::kMinimumOnScreenSize) +
+            "x380", window_->bounds().ToString());
+}
+
+TEST_F(WorkspaceWindowResizerTest, ResizeWindowOutsideBottomWorkArea) {
+  Shell::GetInstance()->SetDisplayWorkAreaInsets(
+      Shell::GetPrimaryRootWindow(), gfx::Insets(0, 0, 50, 0));
+  int bottom = ScreenAsh::GetDisplayWorkAreaBoundsInParent(
+      window_.get()).bottom();
+  int delta_to_bottom = 50;
+  int height = 380;
+  window_->SetBounds(gfx::Rect(100, bottom - delta_to_bottom, 300, height));
+  scoped_ptr<WorkspaceWindowResizer> resizer(WorkspaceWindowResizer::Create(
+      window_.get(), gfx::Point(0, bottom - delta_to_bottom), HTTOP,
+      empty_windows()));
+  ASSERT_TRUE(resizer.get());
+  resizer->Drag(CalculateDragPoint(*resizer, 0, bottom), 0);
+  EXPECT_EQ("100," +
+            base::IntToString(bottom - WindowResizer::kMinimumOnScreenSize) +
+            " 300x" +
+            base::IntToString(height - (delta_to_bottom -
+                                        WindowResizer::kMinimumOnScreenSize)),
+            window_->bounds().ToString());
+}
+
 // Verifies snapping to edges works.
 TEST_F(WorkspaceWindowResizerTest, SnapToEdge) {
   Shell::GetInstance()->SetShelfAutoHideBehavior(