Adding experimental maximize mode (behind a flag)

ash/wm/workspace/frame_maximize_button.cc

Index: ash/wm/workspace/frame_maximize_button.cc
diff --git a/ash/wm/workspace/frame_maximize_button.cc b/ash/wm/workspace/frame_maximize_button.cc
index d258b37894578ee3bc8d6932f903e1d6bc9d6a7f..0329e3f6d4668e5342a2586f4d061dd017991c69 100644
--- a/ash/wm/workspace/frame_maximize_button.cc
+++ b/ash/wm/workspace/frame_maximize_button.cc
@@ -91,6 +91,9 @@ FrameMaximizeButton::FrameMaximizeButton(views::ButtonListener* listener,
       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() {
@@ -306,6 +309,14 @@ void FrameMaximizeButton::OnGestureEvent(ui::GestureEvent* event) {
   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.