Allow layers to signal that additional sequences are needed before surface destruction

content/browser/renderer_host/render_widget_host_view_aura_unittest.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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/memory/shared_memory.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 32 matching lines @@
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/test/aura_test_helper.h"
 #include "ui/aura/test/test_cursor_client.h"
 #include "ui/aura/test/test_screen.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/compositor/compositor.h"
+#include "ui/compositor/layer_tree_owner.h"
 #include "ui/compositor/test/draw_waiter_for_test.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/gesture_detection/gesture_configuration.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/wm/core/default_activation_client.h"
+#include "ui/wm/core/window_util.h"
 
 using testing::_;
 
 using blink::WebGestureEvent;
 using blink::WebInputEvent;
 using blink::WebMouseEvent;
 using blink::WebMouseWheelEvent;
 using blink::WebTouchEvent;
 using blink::WebTouchPoint;
 
@@ skipping 1304 matching lines @@
 
   EXPECT_CALL(observer, OnDelegatedFrameDamage(view_->window_,
                                                gfx::Rect(5, 5, 5, 5)));
   view_->OnSwapCompositorFrame(
       0, MakeDelegatedFrame(1.f, view_size, gfx::Rect(5, 5, 5, 5)));
   testing::Mock::VerifyAndClearExpectations(&observer);
 
   view_->window_->RemoveObserver(&observer);
 }
 
+// Recreating the layers for a window should cause Surface destruction to
+// depend on both layers.
+TEST_F(RenderWidgetHostViewAuraTest, RecreateLayers) {
+  gfx::Size view_size(100, 100);
+  gfx::Rect view_rect(view_size);
+
+  view_->InitAsChild(NULL);
+  aura::client::ParentWindowWithContext(
+      view_->GetNativeView(),
+      parent_view_->GetNativeView()->GetRootWindow(),
+      gfx::Rect());
+  view_->SetSize(view_size);
+  view_->WasShown();
+
+  view_->OnSwapCompositorFrame(0,
+                               MakeDelegatedFrame(1.f, view_size, view_rect));
+  scoped_ptr<ui::LayerTreeOwner> cloned_owner(
+      wm::RecreateLayers(view_->GetNativeView()));
+
+  cc::SurfaceHolder* holder =
+      view_->GetDelegatedFrameHost()->SurfaceHolderForTesting();
+  if (holder) {
+    // Should be a SurfaceSequence for both the original and new layers.
+    std::set<cc::SurfaceSequence> sequences;
+    holder->GetSequenceSet(&sequences);
+    EXPECT_EQ(2u, sequences.size());
+  }
+}
+
 TEST_F(RenderWidgetHostViewAuraTest, Resize) {
   gfx::Size size1(100, 100);
   gfx::Size size2(200, 200);
   gfx::Size size3(300, 300);
 
   aura::Window* root_window = parent_view_->GetNativeView()->GetRootWindow();
   view_->InitAsChild(NULL);
   aura::client::ParentWindowWithContext(
       view_->GetNativeView(), root_window, gfx::Rect(size1));
   view_->WasShown();
@@ skipping 1511 matching lines @@
 }
 
 // Tests that when view initiated shutdown happens (i.e. RWHView is deleted
 // before RWH), we clean up properly and don't leak the RWHVGuest.
 TEST_F(RenderWidgetHostViewGuestAuraTest, GuestViewDoesNotLeak) {
   TearDownEnvironment();
   ASSERT_FALSE(guest_view_weak_.get());
 }
 
 }  // namespace content