[Views] Don't reset button state after dragging if the button is disabled.

ui/views/controls/button/custom_button.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 "ui/views/controls/button/custom_button.h"
 
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/events/event.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/animation/throb_animation.h"
@@ skipping 255 matching lines @@
     return;
 
   // We're about to show the context menu. Showing the context menu likely means
   // we won't get a mouse exited and reset state. Reset it now to be sure.
   if (state_ != STATE_DISABLED)
     SetState(STATE_NORMAL);
   View::ShowContextMenu(p, source_type);
 }
 
 void CustomButton::OnDragDone() {
-  SetState(STATE_NORMAL);
+  // Only reset the state to normal if the button isn't currently disabled
+  // (since disabled buttons may still be able to be dragged).
+  if (state_ != STATE_DISABLED)
+    SetState(STATE_NORMAL);
 }
 
 void CustomButton::GetAccessibleState(ui::AXViewState* state) {
   Button::GetAccessibleState(state);
   switch (state_) {
     case STATE_HOVERED:
       state->AddStateFlag(ui::AX_STATE_HOVERED);
       break;
     case STATE_PRESSED:
       state->AddStateFlag(ui::AX_STATE_PRESSED);
@@ skipping 57 matching lines @@
   if (!details.is_add && state_ != STATE_DISABLED)
     SetState(STATE_NORMAL);
 }
 
 void CustomButton::OnBlur() {
   if (IsHotTracked())
     SetState(STATE_NORMAL);
 }
 
 }  // namespace views