Enable PDF accessibility when RenderFrame's accessibility mode changes.

content/renderer/pepper/pepper_plugin_instance_impl.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/renderer/pepper/pepper_plugin_instance_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bit_cast.h"
@@ skipping 2115 matching lines @@
     std::unique_ptr<cc::SingleReleaseCallback>* release_callback,
     bool use_shared_memory) {
   if (!bound_graphics_2d_platform_)
     return false;
   return bound_graphics_2d_platform_->PrepareTextureMailbox(mailbox,
                                                             release_callback);
 }
 
 void PepperPluginInstanceImpl::OnDestruct() { render_frame_ = NULL; }
 
+void PepperPluginInstanceImpl::AccessibilityModeChanged() {

[raymes, 2016/06/28 00:02:12]

nit: this should go before OnDestruct

[dmazzoni, 2016/06/28 17:14:06]

Done.

+  if (render_frame_->render_accessibility() && LoadPdfInterface())
+    plugin_pdf_interface_->EnableAccessibility(pp_instance());
+}
+
 void PepperPluginInstanceImpl::OnThrottleStateChange() {
   SendDidChangeView();
 
   bool is_throttled = throttler_->IsThrottled();
   render_frame()->Send(new FrameHostMsg_PluginInstanceThrottleStateChange(
       module_->GetPluginChildId(), pp_instance_, is_throttled));
 }
 
 void PepperPluginInstanceImpl::OnHiddenForPlaceholder(bool hidden) {
   UpdateLayer(false /* device_changed */);
@@ skipping 1271 matching lines @@
     const cc::TextureMailbox& mailbox) const {
   auto it =
       std::find_if(texture_ref_counts_.begin(), texture_ref_counts_.end(),
                    [&mailbox](const TextureMailboxRefCount& ref_count) {
                      return ref_count.first.mailbox() == mailbox.mailbox();
                    });
   return it != texture_ref_counts_.end();
 }
 
 }  // namespace content