Disable left/right/maximize for panels.

ash/wm/workspace/frame_maximize_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 "ash/wm/workspace/frame_maximize_button.h"
 
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/wm/property_util.h"
 #include "ash/launcher/launcher.h"
@@ skipping 78 matching lines @@
   return ui::GESTURE_STATUS_UNKNOWN;
 }
 
 // FrameMaximizeButton ---------------------------------------------------------
 
 FrameMaximizeButton::FrameMaximizeButton(views::ButtonListener* listener,
                                          views::NonClientFrameView* frame)
     : ImageButton(listener),
       frame_(frame),
       is_snap_enabled_(false),
+      is_left_right_enabled_(true),
+      is_maximize_enabled_(true),
       exceeded_drag_threshold_(false),
       snap_type_(SNAP_NONE) {
   // TODO(sky): nuke this. It's temporary while we don't have good images.
   SetImageAlignment(ALIGN_LEFT, ALIGN_BOTTOM);
   SetTooltipText(l10n_util::GetStringUTF16(IDS_FRAME_MAXIMIZE_BUTTON_TOOLTIP));
 }
 
 FrameMaximizeButton::~FrameMaximizeButton() {
 }
 
@@ skipping 119 matching lines @@
 
 void FrameMaximizeButton::UpdateSnap(const gfx::Point& location) {
   SnapType type = SnapTypeForLocation(location);
   if (type == snap_type_) {
     if (snap_sizer_.get()) {
       snap_sizer_->Update(LocationForSnapSizer(location));
       phantom_window_->Show(snap_sizer_->target_bounds());
     }
     return;
   }
+  if ((!is_left_right_enabled_ && (type == SNAP_LEFT || type == SNAP_RIGHT)) ||

[sky, 2012/03/25 22:53:05]

Move this to SnapTypeForLocation, otherwise we're going to get inconsistent
behavior. Also, you'll need to update the tooltip too.

[stevenjb, 2012/03/25 23:11:37]

Done. 

+      (!is_maximize_enabled_ && type == SNAP_MAXIMIZE)) {
+    return;
+  }
 
   snap_type_ = type;
   snap_sizer_.reset();
   SchedulePaint();
 
   if (snap_type_ == SNAP_NONE) {
     phantom_window_.reset();
     return;
   }
 
@@ skipping 77 matching lines @@
       break;
     case SNAP_MINIMIZE:
       frame_->GetWidget()->Minimize();
       break;
     default:
       NOTREACHED();
   }
 }
 
 }  // namespace ash