Add support for retrieving image thumbnails as part of the accessibility tree.

content/browser/accessibility/browser_accessibility_manager.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/accessibility/browser_accessibility_manager.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "build/build_config.h"
@@ skipping 586 matching lines @@
     const BrowserAccessibility& node) {
   if (!delegate_)
     return;
 
   ui::AXActionData action_data;
   action_data.action = ui::AX_ACTION_DO_DEFAULT;
   action_data.target_node_id = node.GetId();
   delegate_->AccessibilityPerformAction(action_data);
 }
 
+void BrowserAccessibilityManager::GetImageData(
+    const BrowserAccessibility& node,
+    const gfx::Size& max_size) {
+  if (!delegate_)
+    return;
+
+  ui::AXActionData action_data;
+  action_data.action = ui::AX_ACTION_GET_IMAGE_DATA;
+  action_data.target_node_id = node.GetId();
+  action_data.target_rect = gfx::Rect(gfx::Point(), max_size);
+  delegate_->AccessibilityPerformAction(action_data);
+}
+
 void BrowserAccessibilityManager::Increment(
     const BrowserAccessibility& node) {
   if (!delegate_)
     return;
 
   ui::AXActionData action_data;
   action_data.action = ui::AX_ACTION_INCREMENT;
   action_data.target_node_id = node.GetId();
   delegate_->AccessibilityPerformAction(action_data);
 }
@@ skipping 615 matching lines @@
       hit_test_result = parent;
     parent = parent->GetParent();
   }
 
   last_hover_ax_tree_id_ = hit_test_result->manager()->ax_tree_id();
   last_hover_node_id_ = hit_test_result->GetId();
   last_hover_bounds_ = hit_test_result->GetScreenBoundsRect();
 }
 
 }  // namespace content