Fixes tab dragging out of a window with maximzied bounds

ash/wm/default_state.cc

Index: ash/wm/default_state.cc
diff --git a/ash/wm/default_state.cc b/ash/wm/default_state.cc
index 61a3dc6b09120e7fcb0529e2ee51659898c6b010..58e00b71ae81a337e703631c24be62e2d6dc4818 100644
--- a/ash/wm/default_state.cc
+++ b/ash/wm/default_state.cc
@@ -31,6 +31,11 @@ namespace {
 // must be visible when the window is added to the workspace.
 const float kMinimumPercentOnScreenArea = 0.3f;
 
+// When a window that has restore bounds at least as large as a work area is
+// unmaximized, inset the bounds slightly so that they are not exactly the same.
+// This makes it easier to resize the window.
+const int kMaximizedWindowInset = 10;  // Pixels.

[sky, 2015/06/06 17:59:30]

Is this really pixels?

[varkha, 2015/06/06 20:13:17]

I thought so. Isn't that what window bounds are expressed in?

[sky, 2015/06/07 00:05:20]

It may depend upon the platform, but I have to look. Certainly on chromeos they
are DIPs.

[oshima, 2015/06/07 01:19:02]

This is DIP.

+
 bool IsMinimizedWindowState(const WindowStateType state_type) {
   return state_type == WINDOW_STATE_TYPE_MINIMIZED ||
          state_type == WINDOW_STATE_TYPE_DOCKED_MINIMIZED;
@@ -643,10 +648,9 @@ void DefaultState::UpdateBoundsFromState(WindowState* window_state,
         if (previous_state_type == WINDOW_STATE_TYPE_MAXIMIZED &&
             bounds_in_parent.width() >= work_area_in_parent.width() &&
             bounds_in_parent.height() >= work_area_in_parent.height()) {
-          // Inset the bounds slightly so that they are not exactly same as
-          // the work area bounds and it is easier to resize the window.
           bounds_in_parent = work_area_in_parent;
-          bounds_in_parent.Inset(10, 10, 10, 10);
+          bounds_in_parent.Inset(kMaximizedWindowInset, kMaximizedWindowInset,
+                                 kMaximizedWindowInset, kMaximizedWindowInset);
         }
       } else {
         bounds_in_parent = window->bounds();