Revert of Revert of Migrate accessibility from RenderView to RenderFrame.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 7e017ee531a34972b3d66a9fe2a053cabe0c95a1..72dcc54196c110723416dacfaa8dc14141c6723a 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -9,6 +9,9 @@
 #include "base/lazy_instance.h"
 #include "base/metrics/user_metrics_action.h"
 #include "base/time/time.h"
+#include "content/browser/accessibility/accessibility_mode_helper.h"
+#include "content/browser/accessibility/browser_accessibility_manager.h"
+#include "content/browser/accessibility/browser_accessibility_state_impl.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/frame_host/cross_process_frame_connector.h"
 #include "content/browser/frame_host/cross_site_transferring_request.h"
@@ -22,13 +25,17 @@
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/transition_request_manager.h"
+#include "content/common/accessibility_messages.h"
 #include "content/common/desktop_notification_messages.h"
 #include "content/common/frame_messages.h"
 #include "content/common/input_messages.h"
 #include "content/common/inter_process_time_ticks_converter.h"
 #include "content/common/render_frame_setup.mojom.h"
 #include "content/common/swapped_out_messages.h"
+#include "content/public/browser/ax_event_notification_details.h"
+#include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/desktop_notification_delegate.h"
@@ -38,6 +45,7 @@
 #include "content/public/common/content_constants.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/url_utils.h"
+#include "ui/accessibility/ax_tree.h"
 #include "url/gurl.h"
 
 using base::TimeDelta;
@@ -346,9 +354,78 @@
                         OnCancelDesktopNotification)
     IPC_MESSAGE_HANDLER(FrameHostMsg_TextSurroundingSelectionResponse,
                         OnTextSurroundingSelectionResponse)
+    IPC_MESSAGE_HANDLER(AccessibilityHostMsg_Events, OnAccessibilityEvents)
+    IPC_MESSAGE_HANDLER(AccessibilityHostMsg_LocationChanges,
+                        OnAccessibilityLocationChanges)
   IPC_END_MESSAGE_MAP()
 
   return handled;
+}
+
+void RenderFrameHostImpl::AccessibilitySetFocus(int object_id) {
+  Send(new AccessibilityMsg_SetFocus(routing_id_, object_id));
+}
+
+void RenderFrameHostImpl::AccessibilityDoDefaultAction(int object_id) {
+  Send(new AccessibilityMsg_DoDefaultAction(routing_id_, object_id));
+}
+
+void RenderFrameHostImpl::AccessibilityShowMenu(
+    const gfx::Point& global_point) {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view)
+    view->AccessibilityShowMenu(global_point);
+}
+
+void RenderFrameHostImpl::AccessibilityScrollToMakeVisible(
+    int acc_obj_id, const gfx::Rect& subfocus) {
+  Send(new AccessibilityMsg_ScrollToMakeVisible(
+      routing_id_, acc_obj_id, subfocus));
+}
+
+void RenderFrameHostImpl::AccessibilityScrollToPoint(
+    int acc_obj_id, const gfx::Point& point) {
+  Send(new AccessibilityMsg_ScrollToPoint(
+      routing_id_, acc_obj_id, point));
+}
+
+void RenderFrameHostImpl::AccessibilitySetTextSelection(
+    int object_id, int start_offset, int end_offset) {
+  Send(new AccessibilityMsg_SetTextSelection(
+      routing_id_, object_id, start_offset, end_offset));
+}
+
+bool RenderFrameHostImpl::AccessibilityViewHasFocus() const {
+  RenderWidgetHostView* view = render_view_host_->GetView();
+  if (view)
+    return view->HasFocus();
+  return false;
+}
+
+gfx::Rect RenderFrameHostImpl::AccessibilityGetViewBounds() const {
+  RenderWidgetHostView* view = render_view_host_->GetView();
+  if (view)
+    return view->GetViewBounds();
+  return gfx::Rect();
+}
+
+gfx::Point RenderFrameHostImpl::AccessibilityOriginInScreen(
+    const gfx::Rect& bounds) const {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view)
+    return view->AccessibilityOriginInScreen(bounds);
+  return gfx::Point();
+}
+
+void RenderFrameHostImpl::AccessibilityHitTest(const gfx::Point& point) {
+  Send(new AccessibilityMsg_HitTest(routing_id_, point));
+}
+
+void RenderFrameHostImpl::AccessibilityFatalError() {
+  Send(new AccessibilityMsg_FatalError(routing_id_));
+  browser_accessibility_manager_.reset(NULL);
 }
 
 void RenderFrameHostImpl::Init() {
@@ -772,11 +849,84 @@
   delegate_->UpdateEncoding(this, encoding_name);
 }
 
+
 void RenderFrameHostImpl::OnBeginNavigation(
     const FrameHostMsg_BeginNavigation_Params& params) {
 #if defined(USE_BROWSER_SIDE_NAVIGATION)
   frame_tree_node()->render_manager()->OnBeginNavigation(params);
 #endif
+}
+
+void RenderFrameHostImpl::OnAccessibilityEvents(
+    const std::vector<AccessibilityHostMsg_EventParams>& params) {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+
+
+  AccessibilityMode accessibility_mode = delegate_->GetAccessibilityMode();
+  if ((accessibility_mode != AccessibilityModeOff) && view &&
+      RenderViewHostImpl::IsRVHStateActive(render_view_host_->rvh_state())) {
+    if (accessibility_mode & AccessibilityModeFlagPlatform) {
+      GetOrCreateBrowserAccessibilityManager();
+      if (browser_accessibility_manager_)
+        browser_accessibility_manager_->OnAccessibilityEvents(params);
+    }
+
+    std::vector<AXEventNotificationDetails> details;
+    details.reserve(params.size());
+    for (size_t i = 0; i < params.size(); ++i) {
+      const AccessibilityHostMsg_EventParams& param = params[i];
+      AXEventNotificationDetails detail(param.update.node_id_to_clear,
+                                        param.update.nodes,
+                                        param.event_type,
+                                        param.id,
+                                        GetProcess()->GetID(),
+                                        routing_id_);
+      details.push_back(detail);
+    }
+
+    delegate_->AccessibilityEventReceived(details);
+  }
+
+  // Always send an ACK or the renderer can be in a bad state.
+  Send(new AccessibilityMsg_Events_ACK(routing_id_));
+
+  // The rest of this code is just for testing; bail out if we're not
+  // in that mode.
+  if (accessibility_testing_callback_.is_null())
+    return;
+
+  for (size_t i = 0; i < params.size(); i++) {
+    const AccessibilityHostMsg_EventParams& param = params[i];
+    if (static_cast<int>(param.event_type) < 0)
+      continue;
+    if (!ax_tree_for_testing_) {
+      ax_tree_for_testing_.reset(new ui::AXTree(param.update));
+    } else {
+      CHECK(ax_tree_for_testing_->Unserialize(param.update))
+          << ax_tree_for_testing_->error();
+    }
+    accessibility_testing_callback_.Run(param.event_type, param.id);
+  }
+}
+
+void RenderFrameHostImpl::OnAccessibilityLocationChanges(
+    const std::vector<AccessibilityHostMsg_LocationChangeParams>& params) {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view &&
+      RenderViewHostImpl::IsRVHStateActive(render_view_host_->rvh_state())) {
+    AccessibilityMode accessibility_mode = delegate_->GetAccessibilityMode();
+    if (accessibility_mode & AccessibilityModeFlagPlatform) {
+      if (!browser_accessibility_manager_) {
+        browser_accessibility_manager_.reset(
+            view->CreateBrowserAccessibilityManager(this));
+      }
+      if (browser_accessibility_manager_)
+        browser_accessibility_manager_->OnLocationChanges(params);
+    }
+    // TODO(aboxhall): send location change events to web contents observers too
+  }
 }
 
 void RenderFrameHostImpl::SetPendingShutdown(const base::Closure& on_swap_out) {
@@ -946,6 +1096,46 @@
       routing_id_, callback_context));
 }
 
+void RenderFrameHostImpl::SetAccessibilityMode(AccessibilityMode mode) {
+  Send(new FrameMsg_SetAccessibilityMode(routing_id_, mode));
+}
+
+void RenderFrameHostImpl::SetAccessibilityCallbackForTesting(
+    const base::Callback<void(ui::AXEvent, int)>& callback) {
+  accessibility_testing_callback_ = callback;
+}
+
+const ui::AXTree* RenderFrameHostImpl::GetAXTreeForTesting() {
+  return ax_tree_for_testing_.get();
+}
+
+BrowserAccessibilityManager*
+    RenderFrameHostImpl::GetOrCreateBrowserAccessibilityManager() {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view &&
+      !browser_accessibility_manager_) {
+    browser_accessibility_manager_.reset(
+        view->CreateBrowserAccessibilityManager(this));
+  }
+  return browser_accessibility_manager_.get();
+}
+
+#if defined(OS_WIN)
+void RenderFrameHostImpl::SetParentNativeViewAccessible(
+    gfx::NativeViewAccessible accessible_parent) {
+  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
+      render_view_host_->GetView());
+  if (view)
+    view->SetParentNativeViewAccessible(accessible_parent);
+}
+
+gfx::NativeViewAccessible
+RenderFrameHostImpl::GetParentNativeViewAccessible() const {
+  return delegate_->GetParentNativeViewAccessible();
+}
+#endif  // defined(OS_WIN)
+
 void RenderFrameHostImpl::SetHasPendingTransitionRequest(
     bool has_pending_request) {
   BrowserThread::PostTask(