Revert "Reland "[fuchsia] Register Views with Fuchsia Accessibility APIs""

This reverts commit fe8612d0.

Reason for revert: caused compile failure on Fuchsia ARM64 bot

Sample build: https://ci.chromium.org/p/chromium/builders/ci/Fuchsia%20ARM64/84538

Sample log: https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8902744172135456592/+/steps/compile/0/stdout?format=raw

---
[1007/1649] CXX obj/fuchsia/engine/web_engine_unittests__exec/accessibility_bridge_unittest.o
FAILED: ../../fuchsia/engine/browser/accessibility_bridge_unittest.cc:69:25: error: no member named 'ScopedTaskEnvironment' in namespace 'base::test'; did you mean 'TaskEnvironment'?
base::test::ScopedTaskEnvironment::MainThreadType::IO),
~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
TaskEnvironment
../../base/test/task_environment.h:83:7: note: 'TaskEnvironment' declared here
class TaskEnvironment {
^
1 error generated.
---

Original change's description:
> Reland "[fuchsia] Register Views with Fuchsia Accessibility APIs"
> 
> This is a reland of b02a397f
> 
> This includes the missing deps that caused the component builds to fail
> and EXPORTs the AccessibilityBridge class for testing.
> 
> Original change's description:
> > [fuchsia] Register Views with Fuchsia Accessibility APIs
> >
> > * Add the AccessibilityBridge class skeleton, which will eventually
> > handle the logic for conversion between Chromium and Fuchsia
> > accessibility data structures.
> > * Register a ViewRef to the Fuchsia SemanticsManager.
> >
> > Test: Added AccessibilityBridgeUnitTest.*
> >
> > Bug: 973095
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1708043
> > Commit-Queue: Sharon Yang <yangsharon@chromium.org>
> > Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
> > Reviewed-by: Wez <wez@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#693914}
> 
> Bug: 973095
> Change-Id: I3a5a958fc88a5804023372453420863e97f9df74
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1792460
> Reviewed-by: Wez <wez@chromium.org>
> Commit-Queue: Sharon Yang <yangsharon@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#695013}

TBR=wez@chromium.org,sergeyu@chromium.org,yangsharon@chromium.org

Change-Id: I4f21d8978e9761506bc31d24d9b2f64ee87f8287
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 973095
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1792508Reviewed-by: Takashi Sakamoto <tasak@google.com>
Commit-Queue: Takashi Sakamoto <tasak@google.com>
Cr-Commit-Position: refs/heads/master@{#695016}

fuchsia/engine/BUILD.gn

@@ -86,8 +86,6 @@ component("web_engine_core") {
     "//services/service_manager/sandbox",
     "//skia/public/mojom",
     "//third_party/blink/public/common",
-    "//third_party/fuchsia-sdk/sdk:accessibility_semantics",
-    "//third_party/fuchsia-sdk/sdk:math",
     "//third_party/fuchsia-sdk/sdk:scenic_cpp",
     "//third_party/fuchsia-sdk/sdk:sys_cpp",
     "//third_party/fuchsia-sdk/sdk:web",
@@ -112,8 +110,6 @@ component("web_engine_core") {
   ]
   configs += [ ":web_engine_implementation" ]
   sources = [
-    "browser/accessibility_bridge.cc",
-    "browser/accessibility_bridge.h",
     "browser/content_directory_loader_factory.cc",
     "browser/content_directory_loader_factory.h",
     "browser/context_impl.cc",
@@ -247,7 +243,6 @@ test("web_engine_browsertests") {
 
 test("web_engine_unittests") {
   sources = [
-    "browser/accessibility_bridge_unittest.cc",
     "browser/cookie_manager_impl_unittest.cc",
     "browser/frame_impl_unittest.cc",
     "context_provider_impl_unittest.cc",
@@ -264,8 +259,6 @@ test("web_engine_unittests") {
     "//services/network/public/mojom",
     "//testing/gmock",
     "//testing/gtest",
-    "//third_party/fuchsia-sdk/sdk:accessibility_semantics",
-    "//third_party/fuchsia-sdk/sdk:scenic_cpp",
     "//third_party/fuchsia-sdk/sdk:web",
   ]
 }

fuchsia/engine/browser/accessibility_bridge.cc

-// Copyright 2019 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 "fuchsia/engine/browser/accessibility_bridge.h"
-
-#include "base/logging.h"
-
-AccessibilityBridge::AccessibilityBridge(
-    fuchsia::accessibility::semantics::SemanticsManagerPtr semantics_manager,
-    fuchsia::ui::views::ViewRef view_ref)
-    : binding_(this) {
-  semantics_manager->RegisterViewForSemantics(
-      std::move(view_ref), binding_.NewBinding(), tree_ptr_.NewRequest());
-}
-
-AccessibilityBridge::~AccessibilityBridge() = default;
-
-void AccessibilityBridge::OnAccessibilityActionRequested(
-    uint32_t node_id,
-    fuchsia::accessibility::semantics::Action action,
-    OnAccessibilityActionRequestedCallback callback) {
-  NOTIMPLEMENTED();
-}
-
-void AccessibilityBridge::HitTest(fuchsia::math::PointF local_point,
-                                  HitTestCallback callback) {
-  NOTIMPLEMENTED();
-}
-
-void AccessibilityBridge::OnSemanticsModeChanged(
-    bool updates_enabled,
-    OnSemanticsModeChangedCallback callback) {
-  NOTIMPLEMENTED();
-}

fuchsia/engine/browser/accessibility_bridge.h

-// Copyright 2019 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 FUCHSIA_ENGINE_BROWSER_ACCESSIBILITY_BRIDGE_H_
-#define FUCHSIA_ENGINE_BROWSER_ACCESSIBILITY_BRIDGE_H_
-
-#include <fuchsia/accessibility/semantics/cpp/fidl.h>
-#include <fuchsia/math/cpp/fidl.h>
-#include <fuchsia/ui/views/cpp/fidl.h>
-#include <lib/fidl/cpp/binding.h>
-
-#include "base/macros.h"
-#include "fuchsia/engine/web_engine_export.h"
-
-// This class is the intermediate for accessibility between Chrome and Fuchsia.
-// It handles registration to the Fuchsia Semantics Manager, translating events
-// and data structures between the two services, and forwarding actions and
-// events.
-// The lifetime of an instance of AccessibilityBridge is the same as that of a
-// View created by FrameImpl. This class refers to the View via the
-// caller-supplied ViewRef.
-class WEB_ENGINE_EXPORT AccessibilityBridge
-    : public fuchsia::accessibility::semantics::SemanticListener {
- public:
-  AccessibilityBridge(
-      fuchsia::accessibility::semantics::SemanticsManagerPtr semantics_manager,
-      fuchsia::ui::views::ViewRef view_ref);
-  ~AccessibilityBridge() final;
-
- private:
-  // fuchsia::accessibility::semantics::SemanticListener implementation.
-  void OnAccessibilityActionRequested(
-      uint32_t node_id,
-      fuchsia::accessibility::semantics::Action action,
-      OnAccessibilityActionRequestedCallback callback) final;
-  void HitTest(fuchsia::math::PointF local_point,
-               HitTestCallback callback) final;
-  void OnSemanticsModeChanged(bool updates_enabled,
-                              OnSemanticsModeChangedCallback callback) final;
-
-  fuchsia::accessibility::semantics::SemanticTreePtr tree_ptr_;
-  fidl::Binding<fuchsia::accessibility::semantics::SemanticListener> binding_;
-
-  DISALLOW_COPY_AND_ASSIGN(AccessibilityBridge);
-};
-
-#endif  // FUCHSIA_ENGINE_BROWSER_ACCESSIBILITY_BRIDGE_H_

fuchsia/engine/browser/accessibility_bridge_unittest.cc

-// Copyright 2019 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 "fuchsia/engine/browser/accessibility_bridge.h"
-
-#include <fuchsia/accessibility/semantics/cpp/fidl.h>
-#include <fuchsia/accessibility/semantics/cpp/fidl_test_base.h>
-#include <lib/sys/cpp/component_context.h>
-#include <lib/ui/scenic/cpp/view_ref_pair.h>
-#include <zircon/types.h>
-
-#include "base/fuchsia/default_context.h"
-#include "base/fuchsia/scoped_service_binding.h"
-#include "base/fuchsia/service_directory_client.h"
-#include "base/logging.h"
-#include "base/test/task_environment.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using fuchsia::accessibility::semantics::SemanticListener;
-using fuchsia::accessibility::semantics::SemanticsManager;
-
-namespace {
-
-class FakeSemanticsManager : public fuchsia::accessibility::semantics::testing::
-                                 SemanticsManager_TestBase {
- public:
-  explicit FakeSemanticsManager() = default;
-  ~FakeSemanticsManager() override = default;
-
-  // fuchsia::accessibility::semantics::SemanticsManager implementation.
-  void RegisterViewForSemantics(
-      fuchsia::ui::views::ViewRef view_ref,
-      fidl::InterfaceHandle<SemanticListener> listener,
-      fidl::InterfaceRequest<fuchsia::accessibility::semantics::SemanticTree>
-          semantic_tree) final {
-    view_ref_ = std::move(view_ref);
-    listener_ = std::move(listener);
-    semantic_tree_ = std::move(semantic_tree);
-  }
-
-  bool is_view_registered() const { return view_ref_.reference.is_valid(); }
-
-  bool is_listener_handle_valid() const { return listener_.is_valid(); }
-
-  bool is_semantic_tree_handle_valid() const {
-    return semantic_tree_.is_valid();
-  }
-
-  void NotImplemented_(const std::string& name) final {
-    NOTIMPLEMENTED() << name;
-  }
-
- private:
-  fuchsia::ui::views::ViewRef view_ref_;
-  fidl::InterfaceHandle<SemanticListener> listener_;
-  fidl::InterfaceRequest<fuchsia::accessibility::semantics::SemanticTree>
-      semantic_tree_;
-
-  DISALLOW_COPY_AND_ASSIGN(FakeSemanticsManager);
-};
-
-}  // namespace
-
-class AccessibilityBridgeTest : public testing::Test {
- public:
-  AccessibilityBridgeTest()
-      : task_environment_(
-            base::test::ScopedTaskEnvironment::MainThreadType::IO),
-        semantics_manager_binding_(&semantics_manager_) {}
-  ~AccessibilityBridgeTest() override = default;
-
-  void CreateAccessibilityBridge() {
-    auto view_ref_pair = scenic::ViewRefPair::New();
-    control_ref_ = std::move(view_ref_pair.control_ref);
-    fuchsia::accessibility::semantics::SemanticsManagerPtr
-        semantics_manager_ptr;
-    semantics_manager_binding_.Bind(semantics_manager_ptr.NewRequest());
-    accessibility_bridge_ = std::make_unique<AccessibilityBridge>(
-        std::move(semantics_manager_ptr), std::move(view_ref_pair.view_ref));
-  }
-
- protected:
-  base::test::SingleThreadTaskEnvironment task_environment_;
-  std::unique_ptr<AccessibilityBridge> accessibility_bridge_;
-  FakeSemanticsManager semantics_manager_;
-  fidl::Binding<fuchsia::accessibility::semantics::SemanticsManager>
-      semantics_manager_binding_;
-  fuchsia::ui::views::ViewRefControl control_ref_;
-
-  DISALLOW_COPY_AND_ASSIGN(AccessibilityBridgeTest);
-};
-
-// Test registration to the SemanticsManager.
-TEST_F(AccessibilityBridgeTest, RegisterViewRef) {
-  CreateAccessibilityBridge();
-  // Run loop so FIDL registration requests are processed.
-  task_environment_.RunUntilIdle();
-  EXPECT_TRUE(semantics_manager_.is_view_registered());
-  EXPECT_TRUE(semantics_manager_.is_listener_handle_valid());
-  EXPECT_TRUE(semantics_manager_.is_semantic_tree_handle_valid());
-}