Make sure the dragged window is smaller than work area in the target display

ash/wm/workspace/workspace_layout_manager.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_layout_manager.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_ash.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ skipping 246 matching lines @@
 void WorkspaceLayoutManager::AdjustWindowBoundsWhenAdded(
     wm::WindowState* window_state) {
   // Don't adjust window bounds if the bounds are empty as this
   // happens when a new views::Widget is created.
   // When a window is dragged and dropped onto a different
   // root window, the bounds will be updated after they are added
   // to the root window.
   if (window_state->window()->bounds().IsEmpty())
     return;
 
-  if (window_state->is_dragged())
-    return;
-
-  if (SetMaximizedOrFullscreenBounds(window_state))
-    return;
-
   Window* window = window_state->window();
   gfx::Rect bounds = window->bounds();
-  int min_width = bounds.width() * kMinimumPercentOnScreenArea;
-  int min_height = bounds.height() * kMinimumPercentOnScreenArea;
+
   // Use entire display instead of workarea because the workarea can
   // be further shrunk by the docked area. The logic ensures 30%
   // visibility which should be enough to see where the window gets
   // moved.
   gfx::Rect display_area = ScreenAsh::GetDisplayBoundsInParent(window);
 
+  if (window_state->is_dragged()) {
+    ash::wm::AdjustBoundsToEnsureMinimumWindowVisibility(
+        display_area, &bounds);
+    if (window->bounds() != bounds)
+      window->SetBounds(bounds);
+    return;
+  }
+
+  if (SetMaximizedOrFullscreenBounds(window_state))
+    return;
+
+  int min_width = bounds.width() * kMinimumPercentOnScreenArea;
+  int min_height = bounds.height() * kMinimumPercentOnScreenArea;
   ash::wm::AdjustBoundsToEnsureWindowVisibility(
       display_area, min_width, min_height, &bounds);
   AdjustSnappedBounds(window_state, &bounds);
   if (window->bounds() != bounds)
     window->SetBounds(bounds);
 }
 
 void WorkspaceLayoutManager::UpdateShelfVisibility() {
   if (shelf_)
     shelf_->UpdateVisibilityState();
@@ skipping 134 matching lines @@
   ui::ScopedLayerAnimationSettings slide_settings(layer->GetAnimator());
   slide_settings.SetPreemptionStrategy(
       ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
   slide_settings.SetTransitionDuration(
       base::TimeDelta::FromMilliseconds(kBoundsChangeSlideDurationMs));
   SetChildBoundsDirect(child, bounds);
 }
 
 }  // namespace internal
 }  // namespace ash