diff --git a/libcef/browser/alloy/alloy_browser_host_impl.cc b/libcef/browser/alloy/alloy_browser_host_impl.cc
index 77427f543..3fa30b79c 100644
--- a/libcef/browser/alloy/alloy_browser_host_impl.cc
+++ b/libcef/browser/alloy/alloy_browser_host_impl.cc
@@ -368,20 +368,6 @@ bool AlloyBrowserHostImpl::HasDevTools() {
   return devtools_manager_->HasDevTools();
 }
 
-void AlloyBrowserHostImpl::SetAccessibilityState(
-    cef_state_t accessibility_state) {
-  if (!CEF_CURRENTLY_ON_UIT()) {
-    CEF_POST_TASK(CEF_UIT,
-                  base::BindOnce(&AlloyBrowserHostImpl::SetAccessibilityState,
-                                 this, accessibility_state));
-    return;
-  }
-
-  if (platform_delegate_) {
-    platform_delegate_->SetAccessibilityState(accessibility_state);
-  }
-}
-
 void AlloyBrowserHostImpl::SetAutoResizeEnabled(bool enabled,
                                                 const CefSize& min_size,
                                                 const CefSize& max_size) {
diff --git a/libcef/browser/alloy/alloy_browser_host_impl.h b/libcef/browser/alloy/alloy_browser_host_impl.h
index af2e82db6..04fdd3ef3 100644
--- a/libcef/browser/alloy/alloy_browser_host_impl.h
+++ b/libcef/browser/alloy/alloy_browser_host_impl.h
@@ -117,7 +117,6 @@ class AlloyBrowserHostImpl : public CefBrowserHostBase,
   void DragSourceEndedAt(int x, int y, DragOperationsMask op) override;
   void SetAudioMuted(bool mute) override;
   bool IsAudioMuted() override;
-  void SetAccessibilityState(cef_state_t accessibility_state) override;
   void SetAutoResizeEnabled(bool enabled,
                             const CefSize& min_size,
                             const CefSize& max_size) override;
diff --git a/libcef/browser/alloy/browser_platform_delegate_alloy.cc b/libcef/browser/alloy/browser_platform_delegate_alloy.cc
index c926518aa..7520ed9b7 100644
--- a/libcef/browser/alloy/browser_platform_delegate_alloy.cc
+++ b/libcef/browser/alloy/browser_platform_delegate_alloy.cc
@@ -26,7 +26,6 @@
 #include "components/permissions/permission_request_manager.h"
 #include "components/zoom/zoom_controller.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
-#include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/render_view_host.h"
 #include "extensions/browser/process_manager.h"
 #include "pdf/pdf_features.h"
@@ -313,31 +312,6 @@ void CefBrowserPlatformDelegateAlloy::ConfigureAutoResize() {
   }
 }
 
-void CefBrowserPlatformDelegateAlloy::SetAccessibilityState(
-    cef_state_t accessibility_state) {
-  // Do nothing if state is set to default. It'll be disabled by default and
-  // controlled by the commmand-line flags "force-renderer-accessibility" and
-  // "disable-renderer-accessibility".
-  if (accessibility_state == STATE_DEFAULT) {
-    return;
-  }
-
-  content::WebContentsImpl* web_contents_impl =
-      static_cast<content::WebContentsImpl*>(web_contents_);
-
-  if (!web_contents_impl) {
-    return;
-  }
-
-  ui::AXMode accMode;
-  // In windowless mode set accessibility to TreeOnly mode. Else native
-  // accessibility APIs, specific to each platform, are also created.
-  if (accessibility_state == STATE_ENABLED) {
-    accMode = IsWindowless() ? ui::kAXModeWebContentsOnly : ui::kAXModeComplete;
-  }
-  web_contents_impl->SetAccessibilityMode(accMode);
-}
-
 bool CefBrowserPlatformDelegateAlloy::IsPrintPreviewSupported() const {
   REQUIRE_ALLOY_RUNTIME();
 
diff --git a/libcef/browser/alloy/browser_platform_delegate_alloy.h b/libcef/browser/alloy/browser_platform_delegate_alloy.h
index dbd9e5c0e..be500ab08 100644
--- a/libcef/browser/alloy/browser_platform_delegate_alloy.h
+++ b/libcef/browser/alloy/browser_platform_delegate_alloy.h
@@ -54,7 +54,6 @@ class CefBrowserPlatformDelegateAlloy : public CefBrowserPlatformDelegate {
   void SetAutoResizeEnabled(bool enabled,
                             const CefSize& min_size,
                             const CefSize& max_size) override;
-  void SetAccessibilityState(cef_state_t accessibility_state) override;
   bool IsPrintPreviewSupported() const override;
   void Find(const CefString& searchText,
             bool forward,
diff --git a/libcef/browser/browser_host_base.cc b/libcef/browser/browser_host_base.cc
index 308a2ecdb..cbcee7b8b 100644
--- a/libcef/browser/browser_host_base.cc
+++ b/libcef/browser/browser_host_base.cc
@@ -1009,6 +1009,20 @@ void CefBrowserHostBase::GetFrameNames(std::vector<CefString>& names) {
   }
 }
 
+void CefBrowserHostBase::SetAccessibilityState(
+    cef_state_t accessibility_state) {
+  if (!CEF_CURRENTLY_ON_UIT()) {
+    CEF_POST_TASK(CEF_UIT,
+                  base::BindOnce(&CefBrowserHostBase::SetAccessibilityState,
+                                 this, accessibility_state));
+    return;
+  }
+
+  if (platform_delegate_) {
+    platform_delegate_->SetAccessibilityState(accessibility_state);
+  }
+}
+
 void CefBrowserHostBase::OnStateChanged(CefBrowserContentsState state_changed) {
   // Make sure that CefBrowser state is consistent before the associated
   // CefClient callback is executed.
diff --git a/libcef/browser/browser_host_base.h b/libcef/browser/browser_host_base.h
index d6b1993cd..cfbb86130 100644
--- a/libcef/browser/browser_host_base.h
+++ b/libcef/browser/browser_host_base.h
@@ -262,6 +262,7 @@ class CefBrowserHostBase : public CefBrowserHost,
   size_t GetFrameCount() override;
   void GetFrameIdentifiers(std::vector<CefString>& identifiers) override;
   void GetFrameNames(std::vector<CefString>& names) override;
+  void SetAccessibilityState(cef_state_t accessibility_state) override;
 
   // CefBrowserContentsDelegate::Observer methods:
   void OnStateChanged(CefBrowserContentsState state_changed) override;
diff --git a/libcef/browser/browser_platform_delegate.cc b/libcef/browser/browser_platform_delegate.cc
index 92ec8cd1c..12a2407b5 100644
--- a/libcef/browser/browser_platform_delegate.cc
+++ b/libcef/browser/browser_platform_delegate.cc
@@ -10,6 +10,7 @@
 #include "base/logging.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/shell_integration.h"
+#include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ -409,7 +410,27 @@ void CefBrowserPlatformDelegate::SetAutoResizeEnabled(bool enabled,
 
 void CefBrowserPlatformDelegate::SetAccessibilityState(
     cef_state_t accessibility_state) {
-  NOTIMPLEMENTED();
+  // Do nothing if state is set to default. It'll be disabled by default and
+  // controlled by the command-line flags "force-renderer-accessibility" and
+  // "disable-renderer-accessibility".
+  if (accessibility_state == STATE_DEFAULT) {
+    return;
+  }
+
+  content::WebContentsImpl* web_contents_impl =
+      static_cast<content::WebContentsImpl*>(web_contents_);
+
+  if (!web_contents_impl) {
+    return;
+  }
+
+  ui::AXMode accMode;
+  // In windowless mode set accessibility to TreeOnly mode. Else native
+  // accessibility APIs, specific to each platform, are also created.
+  if (accessibility_state == STATE_ENABLED) {
+    accMode = IsWindowless() ? ui::kAXModeWebContentsOnly : ui::kAXModeComplete;
+  }
+  web_contents_impl->SetAccessibilityMode(accMode);
 }
 
 bool CefBrowserPlatformDelegate::IsPrintPreviewSupported() const {
diff --git a/libcef/browser/chrome/chrome_browser_host_impl.cc b/libcef/browser/chrome/chrome_browser_host_impl.cc
index 7532bc3d3..5ce824ef5 100644
--- a/libcef/browser/chrome/chrome_browser_host_impl.cc
+++ b/libcef/browser/chrome/chrome_browser_host_impl.cc
@@ -369,11 +369,6 @@ bool ChromeBrowserHostImpl::IsAudioMuted() {
   return false;
 }
 
-void ChromeBrowserHostImpl::SetAccessibilityState(
-    cef_state_t accessibility_state) {
-  NOTIMPLEMENTED();
-}
-
 void ChromeBrowserHostImpl::SetAutoResizeEnabled(bool enabled,
                                                  const CefSize& min_size,
                                                  const CefSize& max_size) {
diff --git a/libcef/browser/chrome/chrome_browser_host_impl.h b/libcef/browser/chrome/chrome_browser_host_impl.h
index 8ffd89a17..408bdeba8 100644
--- a/libcef/browser/chrome/chrome_browser_host_impl.h
+++ b/libcef/browser/chrome/chrome_browser_host_impl.h
@@ -104,7 +104,6 @@ class ChromeBrowserHostImpl : public CefBrowserHostBase {
   void DragSourceEndedAt(int x, int y, DragOperationsMask op) override;
   void SetAudioMuted(bool mute) override;
   bool IsAudioMuted() override;
-  void SetAccessibilityState(cef_state_t accessibility_state) override;
   void SetAutoResizeEnabled(bool enabled,
                             const CefSize& min_size,
                             const CefSize& max_size) override;