Add an option to not prune the Android AX tree, to preserve more style info.

content/browser/accessibility/browser_accessibility_android.cc

 // Copyright 2013 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_android.h"
 
 #include "base/i18n/break_iterator.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 63 matching lines @@
   }
 
   // If it has a focusable child, we definitely can't leave out children.
   if (HasFocusableChild())
     return false;
 
   // Date and time controls should drop their children.
   if (GetRole() == ui::AX_ROLE_DATE || GetRole() == ui::AX_ROLE_INPUT_TIME)
     return true;
 
-  // Headings with text can drop their children.
-  base::string16 name = GetText();
-  if (GetRole() == ui::AX_ROLE_HEADING && !name.empty())
-    return true;
+  BrowserAccessibilityManagerAndroid* manager_android =
+      static_cast<BrowserAccessibilityManagerAndroid*>(manager());
+  if (manager_android->prune_tree_for_screen_reader()) {
+    // Headings with text can drop their children.
+    base::string16 name = GetText();
+    if (GetRole() == ui::AX_ROLE_HEADING && !name.empty())
+      return true;
 
-  // Focusable nodes with text can drop their children.
-  if (HasState(ui::AX_STATE_FOCUSABLE) && !name.empty())
-    return true;
+    // Focusable nodes with text can drop their children.
+    if (HasState(ui::AX_STATE_FOCUSABLE) && !name.empty())
+      return true;
 
-  // Nodes with only static text as children can drop their children.
-  if (HasOnlyStaticTextChildren())
-    return true;
+    // Nodes with only static text as children can drop their children.
+    if (HasOnlyStaticTextChildren())
+      return true;
+  }
 
   return BrowserAccessibility::PlatformIsLeaf();
 }
 
 bool BrowserAccessibilityAndroid::CanScrollForward() const {
   if (!IsSlider())
     return false;
 
   float value = GetFloatAttribute(ui::AX_ATTR_VALUE_FOR_RANGE);
   float max = GetFloatAttribute(ui::AX_ATTR_MAX_VALUE_FOR_RANGE);
@@ skipping 770 matching lines @@
 int BrowserAccessibilityAndroid::CountChildrenWithRole(ui::AXRole role) const {
   int count = 0;
   for (uint32 i = 0; i < PlatformChildCount(); i++) {
     if (PlatformGetChild(i)->GetRole() == role)
       count++;
   }
   return count;
 }
 
 }  // namespace content