Eliminate WindowTreeConnection

components/mus/public/cpp/tests/window_tree_client_unittest.cc

 // Copyright 2015 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 "components/mus/public/cpp/lib/window_tree_client_impl.h"
+#include "components/mus/public/cpp/window_tree_client.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "components/mus/common/util.h"
 #include "components/mus/public/cpp/input_event_handler.h"
 #include "components/mus/public/cpp/lib/window_private.h"
 #include "components/mus/public/cpp/property_type_converters.h"
 #include "components/mus/public/cpp/tests/test_window.h"
 #include "components/mus/public/cpp/tests/test_window_tree.h"
-#include "components/mus/public/cpp/tests/window_tree_client_impl_private.h"
+#include "components/mus/public/cpp/tests/window_tree_client_private.h"
 #include "components/mus/public/cpp/window.h"
 #include "components/mus/public/cpp/window_observer.h"
 #include "components/mus/public/cpp/window_property.h"
 #include "components/mus/public/cpp/window_tracker.h"
-#include "components/mus/public/cpp/window_tree_delegate.h"
+#include "components/mus/public/cpp/window_tree_client_delegate.h"
 #include "mojo/common/common_type_converters.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/mojo/input_events_type_converters.h"
 #include "ui/gfx/geometry/mojo/geometry_type_converters.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace mus {
 
 namespace {
 
 void DoNothingWithEventResult(mojom::EventResult result) {}
 
 Id server_id(mus::Window* window) {
   return WindowPrivate(window).server_id();
 }
 
 }  // namespace
 
 mojo::Array<uint8_t> Int32ToPropertyTransportValue(int32_t value) {
   const std::vector<uint8_t> bytes =
       mojo::ConvertTo<std::vector<uint8_t>>(value);
   mojo::Array<uint8_t> transport_value;
   transport_value.resize(bytes.size());
   memcpy(&transport_value.front(), &(bytes.front()), bytes.size());
   return transport_value;
 }
 
-class TestWindowTreeDelegate : public WindowTreeDelegate {
+class TestWindowTreeClientDelegate : public WindowTreeClientDelegate {
  public:
-  TestWindowTreeDelegate() {}
-  ~TestWindowTreeDelegate() override {}
+  TestWindowTreeClientDelegate() {}
+  ~TestWindowTreeClientDelegate() override {}
 
   ui::Event* last_event_observed() { return last_event_observed_.get(); }
 
   void Reset() { last_event_observed_.reset(); }
 
-  // WindowTreeDelegate:
+  // WindowTreeClientDelegate:
   void OnEmbed(Window* root) override {}
-  void OnConnectionLost(WindowTreeConnection* connection) override {}
+  void OnWindowTreeClientDestroyed(WindowTreeClient* client) override {}
   void OnEventObserved(const ui::Event& event, Window* target) override {
     last_event_observed_ = ui::Event::Clone(event);
   }
 
  private:
   std::unique_ptr<ui::Event> last_event_observed_;
 
-  DISALLOW_COPY_AND_ASSIGN(TestWindowTreeDelegate);
+  DISALLOW_COPY_AND_ASSIGN(TestWindowTreeClientDelegate);
 };
 
 class WindowTreeSetup {
  public:
   WindowTreeSetup() : tree_client_(&window_tree_delegate_, nullptr, nullptr) {
-    WindowTreeClientImplPrivate(&tree_client_).OnEmbed(&window_tree_);
+    WindowTreeClientPrivate(&tree_client_).OnEmbed(&window_tree_);
     window_tree_.GetAndClearChangeId(nullptr);
   }
 
-  WindowTreeConnection* window_tree_connection() {
-    return static_cast<WindowTreeConnection*>(&tree_client_);
+  WindowTreeClient* client() {
+    return &tree_client_;
   }
 
   mojom::WindowTreeClient* window_tree_client() {
     return static_cast<mojom::WindowTreeClient*>(&tree_client_);
   }
 
   TestWindowTree* window_tree() { return &window_tree_; }
 
-  TestWindowTreeDelegate* window_tree_delegate() {
+  TestWindowTreeClientDelegate* window_tree_delegate() {
     return &window_tree_delegate_;
   }
 
   Window* GetFirstRoot() {
-    return window_tree_connection()->GetRoots().empty()
-               ? nullptr
-               : *window_tree_connection()->GetRoots().begin();
+    return client()->GetRoots().empty() ? nullptr
+                                        : *client()->GetRoots().begin();
   }
 
   uint32_t GetEventObserverId() {
-    return WindowTreeClientImplPrivate(&tree_client_).event_observer_id();
+    return WindowTreeClientPrivate(&tree_client_).event_observer_id();
   }
 
  private:
   TestWindowTree window_tree_;
-  TestWindowTreeDelegate window_tree_delegate_;
-  WindowTreeClientImpl tree_client_;
+  TestWindowTreeClientDelegate window_tree_delegate_;
+  WindowTreeClient tree_client_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeSetup);
 };
 
 class TestInputEventHandler : public InputEventHandler {
  public:
   TestInputEventHandler()
       : received_event_(false), should_manually_ack_(false) {}
   ~TestInputEventHandler() override {}
 
@@ skipping 28 matching lines @@
     }
   }
 
   bool received_event_;
   bool should_manually_ack_;
   base::Callback<void(mojom::EventResult)> ack_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(TestInputEventHandler);
 };
 
-using WindowTreeClientImplTest = testing::Test;
+using WindowTreeClientTest = testing::Test;
 
 // Verifies bounds are reverted if the server replied that the change failed.
-TEST_F(WindowTreeClientImplTest, SetBoundsFailed) {
+TEST_F(WindowTreeClientTest, SetBoundsFailed) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const gfx::Rect original_bounds(root->bounds());
   const gfx::Rect new_bounds(gfx::Rect(0, 0, 100, 100));
   ASSERT_NE(new_bounds, root->bounds());
   root->SetBounds(new_bounds);
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   setup.window_tree_client()->OnChangeCompleted(change_id, false);
   EXPECT_EQ(original_bounds, root->bounds());
 }
 
 // Simulates a bounds change, and while the bounds change is in flight the
 // server replies with a new bounds and the original bounds change fails.
-TEST_F(WindowTreeClientImplTest, SetBoundsFailedWithPendingChange) {
+TEST_F(WindowTreeClientTest, SetBoundsFailedWithPendingChange) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const gfx::Rect original_bounds(root->bounds());
   const gfx::Rect new_bounds(gfx::Rect(0, 0, 100, 100));
   ASSERT_NE(new_bounds, root->bounds());
   root->SetBounds(new_bounds);
   EXPECT_EQ(new_bounds, root->bounds());
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
@@ skipping 12 matching lines @@
   setup.window_tree_client()->OnChangeCompleted(change_id, false);
   EXPECT_EQ(server_changed_bounds, root->bounds());
 
   // Simulate server changing back to original bounds. Should take immediately.
   setup.window_tree_client()->OnWindowBoundsChanged(
       server_id(root), mojo::Rect::From(server_changed_bounds),
       mojo::Rect::From(original_bounds));
   EXPECT_EQ(original_bounds, root->bounds());
 }
 
-TEST_F(WindowTreeClientImplTest, TwoInFlightBoundsChangesBothCanceled) {
+TEST_F(WindowTreeClientTest, TwoInFlightBoundsChangesBothCanceled) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const gfx::Rect original_bounds(root->bounds());
   const gfx::Rect bounds1(gfx::Rect(0, 0, 100, 100));
   const gfx::Rect bounds2(gfx::Rect(0, 0, 100, 102));
   root->SetBounds(bounds1);
   EXPECT_EQ(bounds1, root->bounds());
   uint32_t change_id1;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id1));
 
   root->SetBounds(bounds2);
   EXPECT_EQ(bounds2, root->bounds());
   uint32_t change_id2;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id2));
 
   // Tell the client change 1 failed. As there is a still a change in flight
   // nothing should happen.
   setup.window_tree_client()->OnChangeCompleted(change_id1, false);
   EXPECT_EQ(bounds2, root->bounds());
 
   // And tell the client change 2 failed too. Should now fallback to original
   // bounds.
   setup.window_tree_client()->OnChangeCompleted(change_id2, false);
   EXPECT_EQ(original_bounds, root->bounds());
 }
 
 // Verifies properties are reverted if the server replied that the change
 // failed.
-TEST_F(WindowTreeClientImplTest, SetPropertyFailed) {
+TEST_F(WindowTreeClientTest, SetPropertyFailed) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   ASSERT_FALSE(root->HasSharedProperty("foo"));
   const int32_t new_value = 11;
   root->SetSharedProperty("foo", new_value);
   ASSERT_TRUE(root->HasSharedProperty("foo"));
   EXPECT_EQ(new_value, root->GetSharedProperty<int32_t>("foo"));
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   setup.window_tree_client()->OnChangeCompleted(change_id, false);
   EXPECT_FALSE(root->HasSharedProperty("foo"));
 }
 
 // Simulates a property change, and while the property change is in flight the
 // server replies with a new property and the original property change fails.
-TEST_F(WindowTreeClientImplTest, SetPropertyFailedWithPendingChange) {
+TEST_F(WindowTreeClientTest, SetPropertyFailedWithPendingChange) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const int32_t value1 = 11;
   root->SetSharedProperty("foo", value1);
   ASSERT_TRUE(root->HasSharedProperty("foo"));
   EXPECT_EQ(value1, root->GetSharedProperty<int32_t>("foo"));
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
 
@@ skipping 13 matching lines @@
   EXPECT_EQ(server_value, root->GetSharedProperty<int32_t>("foo"));
 
   // Simulate server changing back to value1. Should take immediately.
   setup.window_tree_client()->OnWindowSharedPropertyChanged(
       server_id(root), "foo", Int32ToPropertyTransportValue(value1));
   ASSERT_TRUE(root->HasSharedProperty("foo"));
   EXPECT_EQ(value1, root->GetSharedProperty<int32_t>("foo"));
 }
 
 // Verifies visible is reverted if the server replied that the change failed.
-TEST_F(WindowTreeClientImplTest, SetVisibleFailed) {
+TEST_F(WindowTreeClientTest, SetVisibleFailed) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const bool original_visible = root->visible();
   const bool new_visible = !original_visible;
   ASSERT_NE(new_visible, root->visible());
   root->SetVisible(new_visible);
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   setup.window_tree_client()->OnChangeCompleted(change_id, false);
   EXPECT_EQ(original_visible, root->visible());
 }
 
 // Simulates a visible change, and while the visible change is in flight the
 // server replies with a new visible and the original visible change fails.
-TEST_F(WindowTreeClientImplTest, SetVisibleFailedWithPendingChange) {
+TEST_F(WindowTreeClientTest, SetVisibleFailedWithPendingChange) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const bool original_visible = root->visible();
   const bool new_visible = !original_visible;
   ASSERT_NE(new_visible, root->visible());
   root->SetVisible(new_visible);
   EXPECT_EQ(new_visible, root->visible());
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
@@ skipping 12 matching lines @@
   EXPECT_EQ(server_changed_visible, root->visible());
 
   // Simulate server changing back to original visible. Should take immediately.
   setup.window_tree_client()->OnWindowVisibilityChanged(server_id(root),
                                                         original_visible);
   EXPECT_EQ(original_visible, root->visible());
 }
 
 // Verifies that local opacity is not changed if the server replied that the
 // change succeeded.
-TEST_F(WindowTreeClientImplTest, SetOpacitySucceeds) {
+TEST_F(WindowTreeClientTest, SetOpacitySucceeds) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const float original_opacity = root->opacity();
   const float new_opacity = 0.5f;
   ASSERT_NE(new_opacity, original_opacity);
   ASSERT_NE(new_opacity, root->opacity());
   root->SetOpacity(new_opacity);
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   setup.window_tree_client()->OnChangeCompleted(change_id, true);
   EXPECT_EQ(new_opacity, root->opacity());
 }
 
 // Verifies that opacity is reverted if the server replied that the change
 // failed.
-TEST_F(WindowTreeClientImplTest, SetOpacityFailed) {
+TEST_F(WindowTreeClientTest, SetOpacityFailed) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const float original_opacity = root->opacity();
   const float new_opacity = 0.5f;
   ASSERT_NE(new_opacity, root->opacity());
   root->SetOpacity(new_opacity);
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   setup.window_tree_client()->OnChangeCompleted(change_id, false);
   EXPECT_EQ(original_opacity, root->opacity());
 }
 
 // Simulates the server changing the opacitry while there is an opacity change
 // in flight, causing the requested change to fail.
-TEST_F(WindowTreeClientImplTest, SetOpacityFailedWithPendingChange) {
+TEST_F(WindowTreeClientTest, SetOpacityFailedWithPendingChange) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const float original_opacity = root->opacity();
   const float new_opacity = 0.5f;
   ASSERT_NE(new_opacity, root->opacity());
   root->SetOpacity(new_opacity);
   EXPECT_EQ(new_opacity, root->opacity());
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
@@ skipping 12 matching lines @@
   EXPECT_EQ(server_changed_opacity, root->opacity());
 
   // Simulate server changing back to original opacity. Should take immediately.
   setup.window_tree_client()->OnWindowOpacityChanged(
       server_id(root), server_changed_opacity, original_opacity);
   EXPECT_EQ(original_opacity, root->opacity());
 }
 
 // Tests that when there are multiple changes in flight, that failing changes
 // update the revert state of subsequent changes.
-TEST_F(WindowTreeClientImplTest, SetOpacityFailedWithMultiplePendingChange) {
+TEST_F(WindowTreeClientTest, SetOpacityFailedWithMultiplePendingChange) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   const float original_opacity = root->opacity();
   const float new_opacity = 0.5f;
   ASSERT_NE(new_opacity, root->opacity());
   root->SetOpacity(new_opacity);
   uint32_t change_id1;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id1));
 
   const float second_new_opacity = 0.75f;
   ASSERT_NE(second_new_opacity, root->opacity());
   root->SetOpacity(second_new_opacity);
   uint32_t change_id2;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id2));
 
   // Canceling the first one, while there is another in flight, should not
   // change the local opacity.
   setup.window_tree_client()->OnChangeCompleted(change_id1, false);
   EXPECT_EQ(second_new_opacity, root->opacity());
 
   // The previous cancelation should have updated the revert value of the in
   // flight change.
   setup.window_tree_client()->OnChangeCompleted(change_id2, false);
   EXPECT_EQ(original_opacity, root->opacity());
 }
 
 // Verifies |is_modal| is reverted if the server replied that the change failed.
-TEST_F(WindowTreeClientImplTest, SetModalFailed) {
+TEST_F(WindowTreeClientTest, SetModalFailed) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   EXPECT_FALSE(root->is_modal());
   root->SetModal();
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   EXPECT_TRUE(root->is_modal());
   setup.window_tree_client()->OnChangeCompleted(change_id, false);
   EXPECT_FALSE(root->is_modal());
 }
 
-TEST_F(WindowTreeClientImplTest, InputEventBasic) {
+TEST_F(WindowTreeClientTest, InputEventBasic) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
 
   TestInputEventHandler event_handler;
   root->set_input_event_handler(&event_handler);
 
   std::unique_ptr<ui::Event> ui_event(
       new ui::MouseEvent(ui::ET_MOUSE_MOVED, gfx::Point(), gfx::Point(),
                          ui::EventTimeForNow(), ui::EF_NONE, 0));
   setup.window_tree_client()->OnWindowInputEvent(
       1, server_id(root), mojom::Event::From(*ui_event.get()), 0);
   EXPECT_TRUE(event_handler.received_event());
   EXPECT_TRUE(setup.window_tree()->WasEventAcked(1));
   event_handler.Reset();
 
   event_handler.set_should_manually_ack();
   setup.window_tree_client()->OnWindowInputEvent(
       33, server_id(root), mojom::Event::From(*ui_event.get()), 0);
   EXPECT_TRUE(event_handler.received_event());
   EXPECT_FALSE(setup.window_tree()->WasEventAcked(33));
 
   event_handler.AckEvent();
   EXPECT_TRUE(setup.window_tree()->WasEventAcked(33));
 }
 
 // Tests event observers triggered by events that did not hit a target in this
 // window tree.
-TEST_F(WindowTreeClientImplTest, OnEventObserved) {
+TEST_F(WindowTreeClientTest, OnEventObserved) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
 
   // Set up an event observer.
   mojom::EventMatcherPtr matcher = mojom::EventMatcher::New();
   matcher->type_matcher = mojom::EventTypeMatcher::New();
   matcher->type_matcher->type = mojom::EventType::POINTER_DOWN;
-  setup.window_tree_connection()->SetEventObserver(std::move(matcher));
+  setup.client()->SetEventObserver(std::move(matcher));
 
   // Simulate the server sending an observed event.
   uint32_t event_observer_id = setup.GetEventObserverId();
   std::unique_ptr<ui::Event> ui_event(
       new ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(),
                          ui::EventTimeForNow(), ui::EF_CONTROL_DOWN, 0));
   setup.window_tree_client()->OnEventObserved(
       mojom::Event::From(*ui_event.get()), event_observer_id);
 
   // Delegate sensed the event.
   ui::Event* last_event = setup.window_tree_delegate()->last_event_observed();
   EXPECT_EQ(ui::ET_MOUSE_PRESSED, last_event->type());
   EXPECT_EQ(ui::EF_CONTROL_DOWN, last_event->flags());
   setup.window_tree_delegate()->Reset();
 
   // Clear the event observer.
-  setup.window_tree_connection()->SetEventObserver(nullptr);
+  setup.client()->SetEventObserver(nullptr);
 
   // Simulate another event from the server.
   setup.window_tree_client()->OnEventObserved(
       mojom::Event::From(*ui_event.get()), event_observer_id);
 
   // No event was sensed.
   EXPECT_FALSE(setup.window_tree_delegate()->last_event_observed());
 }
 
 // Tests event observers triggered by events that hit this window tree.
-TEST_F(WindowTreeClientImplTest, OnWindowInputEventWithEventObserver) {
+TEST_F(WindowTreeClientTest, OnWindowInputEventWithEventObserver) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
 
   // Set up an event observer.
   mojom::EventMatcherPtr matcher = mojom::EventMatcher::New();
   matcher->type_matcher = mojom::EventTypeMatcher::New();
   matcher->type_matcher->type = mojom::EventType::POINTER_DOWN;
-  setup.window_tree_connection()->SetEventObserver(std::move(matcher));
+  setup.client()->SetEventObserver(std::move(matcher));
 
   // Simulate the server dispatching an event that also matched the observer.
   uint32_t event_observer_id = setup.GetEventObserverId();
   std::unique_ptr<ui::Event> ui_event(
       new ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(),
                          ui::EventTimeForNow(), ui::EF_CONTROL_DOWN, 0));
   setup.window_tree_client()->OnWindowInputEvent(
       1, server_id(root), mojom::Event::From(*ui_event.get()),
       event_observer_id);
 
   // Delegate sensed the event.
   ui::Event* last_event = setup.window_tree_delegate()->last_event_observed();
   EXPECT_EQ(ui::ET_MOUSE_PRESSED, last_event->type());
   EXPECT_EQ(ui::EF_CONTROL_DOWN, last_event->flags());
 }
 
 // Tests that replacing an event observer with a new one results in only new
 // events being observed.
-TEST_F(WindowTreeClientImplTest, EventObserverReplaced) {
+TEST_F(WindowTreeClientTest, EventObserverReplaced) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
 
   // Set up an event observer.
   mojom::EventMatcherPtr matcher1 = mojom::EventMatcher::New();
   matcher1->type_matcher = mojom::EventTypeMatcher::New();
   matcher1->type_matcher->type = mojom::EventType::POINTER_DOWN;
-  setup.window_tree_connection()->SetEventObserver(std::move(matcher1));
+  setup.client()->SetEventObserver(std::move(matcher1));
   uint32_t event_observer_id1 = setup.GetEventObserverId();
 
   // Replace it with a second observer.
   mojom::EventMatcherPtr matcher2 = mojom::EventMatcher::New();
   matcher2->type_matcher = mojom::EventTypeMatcher::New();
   matcher2->type_matcher->type = mojom::EventType::POINTER_UP;
-  setup.window_tree_connection()->SetEventObserver(std::move(matcher2));
+  setup.client()->SetEventObserver(std::move(matcher2));
   uint32_t event_observer_id2 = setup.GetEventObserverId();
 
   // Simulate the server sending an observed event that matched the old observer
   // (e.g. that was in-flight when the observer was replaced).
   std::unique_ptr<ui::Event> pressed_event(
       new ui::MouseEvent(ui::ET_MOUSE_PRESSED, gfx::Point(), gfx::Point(),
                          ui::EventTimeForNow(), ui::EF_NONE, 0));
   setup.window_tree_client()->OnEventObserved(
       mojom::Event::From(*pressed_event.get()), event_observer_id1);
 
   // The event was not sensed, because it does not match the current observer.
   EXPECT_FALSE(setup.window_tree_delegate()->last_event_observed());
 
   // Simulate another event that matches the new observer.
   std::unique_ptr<ui::Event> released_event(
       new ui::MouseEvent(ui::ET_MOUSE_RELEASED, gfx::Point(), gfx::Point(),
                          ui::EventTimeForNow(), ui::EF_CONTROL_DOWN, 0));
   setup.window_tree_client()->OnEventObserved(
       mojom::Event::From(*released_event.get()), event_observer_id2);
 
   // The delegate sensed the event.
   ui::Event* last_event = setup.window_tree_delegate()->last_event_observed();
   EXPECT_EQ(ui::ET_MOUSE_RELEASED, last_event->type());
   EXPECT_EQ(ui::EF_CONTROL_DOWN, last_event->flags());
 }
 
 // Verifies focus is reverted if the server replied that the change failed.
-TEST_F(WindowTreeClientImplTest, SetFocusFailed) {
+TEST_F(WindowTreeClientTest, SetFocusFailed) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   root->SetVisible(true);
-  Window* child = setup.window_tree_connection()->NewWindow();
+  Window* child = setup.client()->NewWindow();
   child->SetVisible(true);
   root->AddChild(child);
-  Window* original_focus = setup.window_tree_connection()->GetFocusedWindow();
+  Window* original_focus = setup.client()->GetFocusedWindow();
   Window* new_focus = child;
   ASSERT_NE(new_focus, original_focus);
   new_focus->SetFocus();
   ASSERT_TRUE(new_focus->HasFocus());
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   setup.window_tree_client()->OnChangeCompleted(change_id, false);
-  EXPECT_EQ(original_focus, setup.window_tree_connection()->GetFocusedWindow());
+  EXPECT_EQ(original_focus, setup.client()->GetFocusedWindow());
 }
 
 // Simulates a focus change, and while the focus change is in flight the server
 // replies with a new focus and the original focus change fails.
-TEST_F(WindowTreeClientImplTest, SetFocusFailedWithPendingChange) {
+TEST_F(WindowTreeClientTest, SetFocusFailedWithPendingChange) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   root->SetVisible(true);
-  Window* child1 = setup.window_tree_connection()->NewWindow();
+  Window* child1 = setup.client()->NewWindow();
   child1->SetVisible(true);
   root->AddChild(child1);
-  Window* child2 = setup.window_tree_connection()->NewWindow();
+  Window* child2 = setup.client()->NewWindow();
   child2->SetVisible(true);
   root->AddChild(child2);
-  Window* original_focus = setup.window_tree_connection()->GetFocusedWindow();
+  Window* original_focus = setup.client()->GetFocusedWindow();
   Window* new_focus = child1;
   ASSERT_NE(new_focus, original_focus);
   new_focus->SetFocus();
   ASSERT_TRUE(new_focus->HasFocus());
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
 
   // Simulate the server responding with a focus change.
   setup.window_tree_client()->OnWindowFocused(server_id(child2));
 
   // This shouldn't trigger focus changing yet.
   EXPECT_TRUE(child1->HasFocus());
 
   // Tell the client the change failed, which should trigger failing to the
   // most recent focus from server.
   setup.window_tree_client()->OnChangeCompleted(change_id, false);
   EXPECT_FALSE(child1->HasFocus());
   EXPECT_TRUE(child2->HasFocus());
-  EXPECT_EQ(child2, setup.window_tree_connection()->GetFocusedWindow());
+  EXPECT_EQ(child2, setup.client()->GetFocusedWindow());
 
   // Simulate server changing focus to child1. Should take immediately.
   setup.window_tree_client()->OnWindowFocused(server_id(child1));
   EXPECT_TRUE(child1->HasFocus());
 }
 
-TEST_F(WindowTreeClientImplTest, FocusOnRemovedWindowWithInFlightFocusChange) {
+TEST_F(WindowTreeClientTest, FocusOnRemovedWindowWithInFlightFocusChange) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
   root->SetVisible(true);
-  Window* child1 = setup.window_tree_connection()->NewWindow();
+  Window* child1 = setup.client()->NewWindow();
   child1->SetVisible(true);
   root->AddChild(child1);
-  Window* child2 = setup.window_tree_connection()->NewWindow();
+  Window* child2 = setup.client()->NewWindow();
   child2->SetVisible(true);
   root->AddChild(child2);
 
   child1->SetFocus();
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
 
   // Destroy child1, which should set focus to null.
   child1->Destroy();
-  EXPECT_EQ(nullptr, setup.window_tree_connection()->GetFocusedWindow());
+  EXPECT_EQ(nullptr, setup.client()->GetFocusedWindow());
 
   // Server changes focus to 2.
   setup.window_tree_client()->OnWindowFocused(server_id(child2));
   // Shouldn't take immediately.
   EXPECT_FALSE(child2->HasFocus());
 
   // Ack the change, focus should still be null.
   setup.window_tree_client()->OnChangeCompleted(change_id, true);
-  EXPECT_EQ(nullptr, setup.window_tree_connection()->GetFocusedWindow());
+  EXPECT_EQ(nullptr, setup.client()->GetFocusedWindow());
 
   // Change to 2 again, this time it should take.
   setup.window_tree_client()->OnWindowFocused(server_id(child2));
   EXPECT_TRUE(child2->HasFocus());
 }
 
 class ToggleVisibilityFromDestroyedObserver : public WindowObserver {
  public:
   explicit ToggleVisibilityFromDestroyedObserver(Window* window)
       : window_(window) {
     window_->AddObserver(this);
   }
 
   ToggleVisibilityFromDestroyedObserver() { EXPECT_FALSE(window_); }
 
   // WindowObserver:
   void OnWindowDestroyed(Window* window) override {
     window_->SetVisible(!window->visible());
     window_->RemoveObserver(this);
     window_ = nullptr;
   }
 
  private:
   Window* window_;
 
   DISALLOW_COPY_AND_ASSIGN(ToggleVisibilityFromDestroyedObserver);
 };
 
-TEST_F(WindowTreeClientImplTest, ToggleVisibilityFromWindowDestroyed) {
+TEST_F(WindowTreeClientTest, ToggleVisibilityFromWindowDestroyed) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
-  Window* child1 = setup.window_tree_connection()->NewWindow();
+  Window* child1 = setup.client()->NewWindow();
   root->AddChild(child1);
   ToggleVisibilityFromDestroyedObserver toggler(child1);
   // Destroying the window triggers
   // ToggleVisibilityFromDestroyedObserver::OnWindowDestroyed(), which toggles
   // the visibility of the window. Ack the change, which should not crash or
   // trigger DCHECKs.
   child1->Destroy();
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   setup.window_tree_client()->OnChangeCompleted(change_id, true);
 }
 
-TEST_F(WindowTreeClientImplTest, NewTopLevelWindow) {
+TEST_F(WindowTreeClientTest, NewTopLevelWindow) {
   WindowTreeSetup setup;
   Window* root1 = setup.GetFirstRoot();
   ASSERT_TRUE(root1);
-  Window* root2 = setup.window_tree_connection()->NewTopLevelWindow(nullptr);
+  Window* root2 = setup.client()->NewTopLevelWindow(nullptr);
   ASSERT_TRUE(root2);
   EXPECT_TRUE(WindowPrivate(root2).parent_drawn());
   ASSERT_NE(root2, root1);
   EXPECT_NE(server_id(root2), server_id(root1));
-  EXPECT_EQ(2u, setup.window_tree_connection()->GetRoots().size());
-  EXPECT_TRUE(setup.window_tree_connection()->GetRoots().count(root1) > 0u);
-  EXPECT_TRUE(setup.window_tree_connection()->GetRoots().count(root2) > 0u);
+  EXPECT_EQ(2u, setup.client()->GetRoots().size());
+  EXPECT_TRUE(setup.client()->GetRoots().count(root1) > 0u);
+  EXPECT_TRUE(setup.client()->GetRoots().count(root2) > 0u);
 
   // Ack the request to the windowtree to create the new window.
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   EXPECT_EQ(setup.window_tree()->window_id(), server_id(root2));
 
   mojom::WindowDataPtr data = mojom::WindowData::New();
   data->window_id = server_id(root2);
   data->display_id = 1;
   setup.window_tree_client()->OnTopLevelCreated(change_id, std::move(data),
                                                 false);
 
   EXPECT_FALSE(WindowPrivate(root2).parent_drawn());
 
   // Should not be able to add a top level as a child of another window.
   root1->AddChild(root2);
   ASSERT_EQ(nullptr, root2->parent());
 
   // Destroy the first root, shouldn't initiate tear down.
   root1->Destroy();
   root1 = nullptr;
-  EXPECT_EQ(1u, setup.window_tree_connection()->GetRoots().size());
-  EXPECT_TRUE(setup.window_tree_connection()->GetRoots().count(root2) > 0u);
+  EXPECT_EQ(1u, setup.client()->GetRoots().size());
+  EXPECT_TRUE(setup.client()->GetRoots().count(root2) > 0u);
 }
 
-TEST_F(WindowTreeClientImplTest, NewTopLevelWindowGetsPropertiesFromData) {
+TEST_F(WindowTreeClientTest, NewTopLevelWindowGetsPropertiesFromData) {
   WindowTreeSetup setup;
   Window* root1 = setup.GetFirstRoot();
   ASSERT_TRUE(root1);
-  Window* root2 = setup.window_tree_connection()->NewTopLevelWindow(nullptr);
+  Window* root2 = setup.client()->NewTopLevelWindow(nullptr);
   ASSERT_TRUE(root2);
 
   EXPECT_FALSE(root2->IsDrawn());
   EXPECT_FALSE(root2->visible());
 
   // Ack the request to the windowtree to create the new window.
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   EXPECT_EQ(setup.window_tree()->window_id(), server_id(root2));
 
   mojom::WindowDataPtr data = mojom::WindowData::New();
   data->window_id = server_id(root2);
   data->display_id = 1;
   data->bounds = mojo::Rect::From(gfx::Rect(1, 2, 3, 4));
   data->visible = true;
   setup.window_tree_client()->OnTopLevelCreated(change_id, std::move(data),
                                                 true);
 
   // Make sure all the properties took.
   EXPECT_TRUE(root2->IsDrawn());
   EXPECT_TRUE(root2->visible());
   EXPECT_EQ(1, root2->display_id());
   EXPECT_EQ(gfx::Rect(1, 2, 3, 4), root2->bounds());
 }
 
-TEST_F(WindowTreeClientImplTest, NewTopLevelWindowGetsAllChangesInFlight) {
+TEST_F(WindowTreeClientTest, NewTopLevelWindowGetsAllChangesInFlight) {
   WindowTreeSetup setup;
   Window* root1 = setup.GetFirstRoot();
   ASSERT_TRUE(root1);
-  Window* root2 = setup.window_tree_connection()->NewTopLevelWindow(nullptr);
+  Window* root2 = setup.client()->NewTopLevelWindow(nullptr);
   ASSERT_TRUE(root2);
 
   EXPECT_FALSE(root2->IsDrawn());
   EXPECT_FALSE(root2->visible());
 
   // Get the id of the in flight change for creating the new window.
   uint32_t new_window_in_flight_change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(
       &new_window_in_flight_change_id));
   EXPECT_EQ(setup.window_tree()->window_id(), server_id(root2));
@@ skipping 61 matching lines @@
                                                 false);
   EXPECT_EQ(2u, root2->shared_properties().size());
   ASSERT_TRUE(root2->HasSharedProperty("yy"));
   EXPECT_EQ("server_yy", root2->GetSharedProperty<std::string>("yy"));
   ASSERT_TRUE(root2->HasSharedProperty("xx"));
   EXPECT_EQ("server_xx", root2->GetSharedProperty<std::string>("xx"));
 }
 
 // Tests that if the client has multiple unowned windows, and one of them is a
 // transient child to another, the  teardown can happen cleanly.
-TEST_F(WindowTreeClientImplTest, MultipleUnOwnedWindowsDuringDestruction) {
+TEST_F(WindowTreeClientTest, MultipleUnOwnedWindowsDuringDestruction) {
   std::unique_ptr<WindowTreeSetup> setup(new WindowTreeSetup());
   Window* root1 = setup->GetFirstRoot();
   ASSERT_TRUE(root1);
-  Window* root2 = setup->window_tree_connection()->NewTopLevelWindow(nullptr);
+  Window* root2 = setup->client()->NewTopLevelWindow(nullptr);
   ASSERT_TRUE(root2);
   root1->AddTransientWindow(root2);
 
   WindowTracker tracker;
   tracker.Add(root1);
   tracker.Add(root2);
   setup.reset();
   EXPECT_TRUE(tracker.windows().empty());
 }
 
-TEST_F(WindowTreeClientImplTest, TopLevelWindowDestroyedBeforeCreateComplete) {
+TEST_F(WindowTreeClientTest, TopLevelWindowDestroyedBeforeCreateComplete) {
   WindowTreeSetup setup;
   Window* root1 = setup.GetFirstRoot();
   ASSERT_TRUE(root1);
-  Window* root2 = setup.window_tree_connection()->NewTopLevelWindow(nullptr);
+  Window* root2 = setup.client()->NewTopLevelWindow(nullptr);
   ASSERT_TRUE(root2);
-  ASSERT_EQ(2u, setup.window_tree_connection()->GetRoots().size());
+  ASSERT_EQ(2u, setup.client()->GetRoots().size());
 
   // Get the id of the in flight change for creating the new window.
   uint32_t change_id;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id));
   EXPECT_EQ(setup.window_tree()->window_id(), server_id(root2));
 
   mojom::WindowDataPtr data = mojom::WindowData::New();
   data->window_id = server_id(root2);
   data->display_id = 1;
 
   // Destroy the window before the server has a chance to ack the window
   // creation.
   root2->Destroy();
-  EXPECT_EQ(1u, setup.window_tree_connection()->GetRoots().size());
+  EXPECT_EQ(1u, setup.client()->GetRoots().size());
 
   setup.window_tree_client()->OnTopLevelCreated(change_id, std::move(data),
                                                 true);
-  EXPECT_EQ(1u, setup.window_tree_connection()->GetRoots().size());
+  EXPECT_EQ(1u, setup.client()->GetRoots().size());
 }
 
 // Tests both SetCapture and ReleaseCapture, to ensure that Window is properly
 // updated on failures.
-TEST_F(WindowTreeClientImplTest, ExplicitCapture) {
+TEST_F(WindowTreeClientTest, ExplicitCapture) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
 
   root->SetCapture();
   EXPECT_TRUE(root->HasCapture());
   uint32_t change_id1;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id1));
   setup.window_tree_client()->OnChangeCompleted(change_id1, false);
   EXPECT_FALSE(root->HasCapture());
@@ skipping 13 matching lines @@
   EXPECT_TRUE(root->HasCapture());
 
   root->ReleaseCapture();
   uint32_t change_id4;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id4));
   setup.window_tree_client()->OnChangeCompleted(change_id4, true);
   EXPECT_FALSE(root->HasCapture());
 }
 
 // Tests that when capture is lost, that the window tree updates properly.
-TEST_F(WindowTreeClientImplTest, LostCapture) {
+TEST_F(WindowTreeClientTest, LostCapture) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
 
   root->SetCapture();
   EXPECT_TRUE(root->HasCapture());
   uint32_t change_id1;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id1));
   setup.window_tree_client()->OnChangeCompleted(change_id1, true);
   EXPECT_TRUE(root->HasCapture());
 
   // The second SetCapture should be ignored.
   root->SetCapture();
   uint32_t change_id2;
   ASSERT_FALSE(setup.window_tree()->GetAndClearChangeId(&change_id2));
 
   setup.window_tree_client()->OnLostCapture(server_id(root));
   EXPECT_FALSE(root->HasCapture());
 }
 
 // Tests that when capture is lost, while there is a release capture request
 // inflight, that the revert value of that request is updated correctly.
-TEST_F(WindowTreeClientImplTest, LostCaptureDifferentInFlightChange) {
+TEST_F(WindowTreeClientTest, LostCaptureDifferentInFlightChange) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
   ASSERT_TRUE(root);
 
   root->SetCapture();
   EXPECT_TRUE(root->HasCapture());
   uint32_t change_id1;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id1));
   setup.window_tree_client()->OnChangeCompleted(change_id1, true);
   EXPECT_TRUE(root->HasCapture());
 
   // The ReleaseCapture should be updated to the revert of the SetCapture.
   root->ReleaseCapture();
   uint32_t change_id2;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id2));
 
   setup.window_tree_client()->OnLostCapture(server_id(root));
   EXPECT_FALSE(root->HasCapture());
 
   setup.window_tree_client()->OnChangeCompleted(change_id2, false);
   EXPECT_FALSE(root->HasCapture());
 }
 
 // Tests that while two windows can inflight capture requests, that the
 // WindowTreeClient only identifies one as having the current capture.
-TEST_F(WindowTreeClientImplTest, TwoWindowsRequestCapture) {
+TEST_F(WindowTreeClientTest, TwoWindowsRequestCapture) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
-  Window* child = setup.window_tree_connection()->NewWindow();
+  Window* child = setup.client()->NewWindow();
   child->SetVisible(true);
   root->AddChild(child);
 
   root->SetCapture();
   EXPECT_TRUE(root->HasCapture());
   uint32_t change_id1;
   ASSERT_TRUE(setup.window_tree()->GetAndClearChangeId(&change_id1));
 
   child->SetCapture();
   EXPECT_TRUE(child->HasCapture());
@@ skipping 10 matching lines @@
   EXPECT_FALSE(child->HasCapture());
   EXPECT_TRUE(root->HasCapture());
 
   setup.window_tree_client()->OnLostCapture(server_id(root));
   EXPECT_FALSE(root->HasCapture());
 }
 
 TEST_F(WindowTreeClientImplTest, WindowDestroyedWhileTransientChildHasCapture) {
   WindowTreeSetup setup;
   Window* root = setup.GetFirstRoot();
-  Window* transient_parent = setup.window_tree_connection()->NewWindow();
-  Window* transient_child = setup.window_tree_connection()->NewWindow();
+  Window* transient_parent = setup.window_tree_client()->NewWindow();
+  Window* transient_child = setup.window_tree_client()->NewWindow();
   transient_parent->SetVisible(true);
   transient_child->SetVisible(true);
   root->AddChild(transient_parent);
   root->AddChild(transient_child);
 
   transient_parent->AddTransientWindow(transient_child);
 
   WindowTracker tracker;
   tracker.Add(transient_parent);
   tracker.Add(transient_child);
   // Request a capture on the transient child, then destroy the transient
   // parent. That will destroy both windows, and should reset the capture window
   // correctly.
   transient_child->SetCapture();
   transient_parent->Destroy();
   EXPECT_TRUE(tracker.windows().empty());
 
   // Create a new Window, and attempt to place capture on that.
-  Window* child = setup.window_tree_connection()->NewWindow();
+  Window* child = setup.window_tree_client()->NewWindow();
   child->SetVisible(true);
   root->AddChild(child);
   child->SetCapture();
   EXPECT_TRUE(child->HasCapture());
 }
 
 }  // namespace mus