Adding experimental maximize mode (behind a flag)

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/launcher/launcher.h"
 #include "ash/screen_ash.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
@@ skipping 73 matching lines @@
     : ImageButton(listener),
       frame_(frame),
       is_snap_enabled_(false),
       exceeded_drag_threshold_(false),
       widget_(NULL),
       press_is_gesture_(false),
       snap_type_(SNAP_NONE),
       bubble_appearance_delay_ms_(kBubbleAppearanceDelayMS) {
   // TODO(sky): nuke this. It's temporary while we don't have good images.
   SetImageAlignment(ALIGN_LEFT, ALIGN_BOTTOM);
+
+  if (ash::Shell::IsForcedMaximizeMode())
+    views::View::SetVisible(false);
 }
 
 FrameMaximizeButton::~FrameMaximizeButton() {
   // Before the window gets destroyed, the maximizer dialog needs to be shut
   // down since it would otherwise call into a deleted object.
   maximizer_.reset();
   if (widget_)
     OnWindowDestroying(widget_->GetNativeWindow());
 }
 
@@ skipping 195 matching lines @@
         event->type() == ui::ET_GESTURE_SCROLL_BEGIN) {
       ProcessUpdateEvent(*event);
       event->SetHandled();
       return;
     }
   }
 
   ImageButton::OnGestureEvent(event);
 }
 
+void FrameMaximizeButton::SetVisible(bool visible) {
+  // In the enforced maximized mode we do not allow to be made visible.
+  if (ash::Shell::IsForcedMaximizeMode())
+    return;
+
+  views::View::SetVisible(visible);
+}
+
 void FrameMaximizeButton::ProcessStartEvent(const ui::LocatedEvent& event) {
   DCHECK(is_snap_enabled_);
   // Prepare the help menu.
   if (!maximizer_) {
     maximizer_.reset(new MaximizeBubbleController(
         this,
         GetMaximizeBubbleFrameState(),
         bubble_appearance_delay_ms_));
   } else {
     // If the menu did not show up yet, we delay it even a bit more.
@@ skipping 281 matching lines @@
     return FRAME_STATE_SNAP_LEFT;
   if (bounds.right() == screen.right())
     return FRAME_STATE_SNAP_RIGHT;
   // If we come here, it is likely caused by the fact that the
   // "VerticalResizeDoubleClick" stored a restore rectangle. In that case
   // we allow all maximize operations (and keep the restore rectangle).
   return FRAME_STATE_NONE;
 }
 
 }  // namespace ash