Enable showing the toolkit-views simplified fullscreen UI on Mac.

Puts the new simplified fullscreen UI behind
chrome://flags/#simplified-fullscreen-ui on Mac.

It uses the toolkit-views UI, since it's already written and works
pretty well. Only few things need to be farmed out to the delegate
since the bubble can't assume its parent is a views::Widget.

Fixes a quirk where opacity-animating bubbles would briefly change
their bounds to have zero-height and back during construction. (We
complain about visible but zero-sized Widgets on Mac).

If this all works we can delete some ~700 lines of Cocoa code when
this simplified fullscreen UI is default on Mac.

BUG=352425

Review URL: https://codereview.chromium.org/1654723002

Cr-Commit-Position: refs/heads/master@{#373386}

1 files changed, 20 insertions, 3 deletions

diff --git a/chrome/browser/ui/views/exclusive_access_bubble_views_context.h b/chrome/browser/ui/views/exclusive_access_bubble_views_context.h
index 5d0f3d4..d2300ea 100644
--- a/chrome/browser/ui/views/exclusive_access_bubble_views_context.h
+++ b/chrome/browser/ui/views/exclusive_access_bubble_views_context.h
@@ -5,9 +5,14 @@
 #define CHROME_BROWSER_UI_VIEWS_EXCLUSIVE_ACCESS_BUBBLE_VIEWS_CONTEXT_H_
 
 #include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/native_widget_types.h"
 
 class ExclusiveAccessManager;
 
+namespace ui {
+class AcceleratorProvider;
+}
+
 namespace views {
 class Widget;
 }
@@ -15,16 +20,28 @@ class Widget;
 // Context in which the exclusive access bubble view is initiated.
 class ExclusiveAccessBubbleViewsContext {
  public:
-  virtual ~ExclusiveAccessBubbleViewsContext() {}
-
   // Returns ExclusiveAccessManager controlling exclusive access for the given
   // webview.
   virtual ExclusiveAccessManager* GetExclusiveAccessManager() = 0;
 
   // Returns the Widget that hosts the view containing the exclusive access
-  // bubble.
+  // bubble. Not used for the simplified fullscreen UI.
   virtual views::Widget* GetBubbleAssociatedWidget() = 0;
 
+  // Returns the AcceleratorProvider, providing the shortcut key to exit the
+  // exclusive access.
+  virtual ui::AcceleratorProvider* GetAcceleratorProvider() = 0;
+
+  // Returns the view used to parent the bubble Widget.
+  virtual gfx::NativeView GetBubbleParentView() const = 0;
+
+  // Return the current mouse cursor location, offset from the top-left of the
+  // parent window.
+  virtual gfx::Point GetCursorPointInParent() const = 0;
+
+  // Return the current bounds (not restored bounds) of the parent window.
+  virtual gfx::Rect GetClientAreaBoundsInScreen() const = 0;
+
   // Returns true if immersive mode is enabled.
   virtual bool IsImmersiveModeEnabled() = 0;