Add detached mode plumbing

ui/accelerated_widget_mac/accelerated_widget_mac.h

 // Copyright 2014 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.
 
 #ifndef UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_
 #define UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_
 
 #include <IOSurface/IOSurface.h>
 #include <vector>
 
 #include "base/mac/scoped_cftyperef.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "ui/accelerated_widget_mac/accelerated_widget_mac_export.h"
 #include "ui/base/cocoa/remote_layer_api.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(__OBJC__)
 #import <Cocoa/Cocoa.h>
 #import "base/mac/scoped_nsobject.h"
+@class DetachedModeWindow;
 #endif  // __OBJC__
 
 class SkCanvas;
 
 namespace cc {
 class SoftwareFrameData;
 }
 
 namespace ui {
 
@@ skipping 28 matching lines @@
 
   // Return true if the last frame swapped has a size in DIP of |dip_size|.
   bool HasFrameOfSize(const gfx::Size& dip_size) const;
 
   // Populate the vsync parameters for the surface's display.
   void GetVSyncParameters(
       base::TimeTicks* timebase, base::TimeDelta* interval) const;
 
   void GotFrame(CAContextID ca_context_id,
                 base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
+                bool use_detached,
+                CAContextID detached_ca_context_id,
                 const gfx::Size& pixel_size,
                 float scale_factor);
 
+  NSWindow* CreateDetachedModeWindow();
+  void DestroyDetachedModeWindow();
+  void EnterDetachedMode();
+  void LeaveDetachedMode();
+
  private:
   void GotCAContextFrame(CAContextID ca_context_id,
+                         bool use_detached,
+                         CAContextID detached_ca_context_id,
                          const gfx::Size& pixel_size,
                          float scale_factor);
 
   void GotIOSurfaceFrame(base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
                          const gfx::Size& pixel_size,
                          float scale_factor);
 
   // Remove a layer from the heirarchy and destroy it. Because the accelerated
   // layer types may be replaced by a layer of the same type, the layer to
   // destroy is parameterized, and, if it is the current layer, the current
   // layer is reset.
   void DestroyCAContextLayer(
       base::scoped_nsobject<CALayerHost> ca_context_layer);
   void DestroyLocalLayer();
   void EnsureLocalLayer();
 
   // The AcceleratedWidgetMacNSView that is using this as its internals.
   AcceleratedWidgetMacNSView* view_;
 
   // A phony NSView handle used to identify this.
   gfx::AcceleratedWidget native_widget_;
 
+  base::scoped_nsobject<DetachedModeWindow> detached_mode_window_;
+
   // A flipped layer, which acts as the parent of the compositing and software
   // layers. This layer is flipped so that the we don't need to recompute the
   // origin for sub-layers when their position changes (this is impossible when
   // using remote layers, as their size change cannot be synchronized with the
   // window). This indirection is needed because flipping hosted layers (like
   // |background_layer_| of RenderWidgetHostViewCocoa) leads to unpredictable
   // behavior.
   base::scoped_nsobject<CALayer> flipped_layer_;
 
   // The accelerated CoreAnimation layer hosted by the GPU process.
   base::scoped_nsobject<CALayerHost> ca_context_layer_;
+  base::scoped_nsobject<CALayerHost> detached_ca_context_layer_;
+  bool in_detached_mode_ = false;
 
   // The locally drawn layer, which has its contents set to an IOSurface.
   base::scoped_nsobject<CALayer> local_layer_;
 
   // The size in DIP of the last swap received from |compositor_|.
   gfx::Size last_swap_size_dip_;
 
+  base::WeakPtrFactory<AcceleratedWidgetMac> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(AcceleratedWidgetMac);
 };
 
 #endif  // __OBJC__
 
 ACCELERATED_WIDGET_MAC_EXPORT
 void AcceleratedWidgetMacGotFrame(
     gfx::AcceleratedWidget widget,
     CAContextID ca_context_id,
     base::ScopedCFTypeRef<IOSurfaceRef> io_surface,
+    bool use_detached,
+    CAContextID detached_ca_context_id,
     const gfx::Size& pixel_size,
     float scale_factor,
     base::TimeTicks* vsync_timebase,
     base::TimeDelta* vsync_interval);
 
 }  // namespace ui
 
 #endif  // UI_ACCELERATED_WIDGET_MAC_ACCELERATED_WIDGET_MAC_H_