Support additional webkit accessibility notifications and states.

chrome/browser/renderer_host/browser_render_process_host.cc

Index: chrome/browser/renderer_host/browser_render_process_host.cc
===================================================================
--- chrome/browser/renderer_host/browser_render_process_host.cc	(revision 60480)
+++ chrome/browser/renderer_host/browser_render_process_host.cc	(working copy)
@@ -201,6 +201,7 @@
       ALLOW_THIS_IN_INITIALIZER_LIST(cached_dibs_cleaner_(
             base::TimeDelta::FromSeconds(5),
             this, &BrowserRenderProcessHost::ClearTransportDIBCache)),
+      accessibility_enabled_(false),
       extension_process_(false) {
   widget_helper_ = new RenderWidgetHelper();
 
@@ -246,12 +247,15 @@
   ClearTransportDIBCache();
 }
 
-bool BrowserRenderProcessHost::Init(bool is_extensions_process) {
+bool BrowserRenderProcessHost::Init(
+    bool is_accessibility_enabled, bool is_extensions_process) {
   // calling Init() more than once does nothing, this makes it more convenient
   // for the view host which may not be sure in some cases
   if (channel_.get())
     return true;
 
+  accessibility_enabled_ = is_accessibility_enabled;
+
   // It is possible for an extension process to be reused for non-extension
   // content, e.g. if an extension calls window.open.
   extension_process_ = extension_process_ || is_extensions_process;
@@ -449,6 +453,9 @@
   if (logging::DialogsAreSuppressed())
     command_line->AppendSwitch(switches::kNoErrorDialogs);
 
+  if (accessibility_enabled_)
+    command_line->AppendSwitch(switches::kEnableAccessibility);
+
   // Now send any options from our own command line we want to propogate.
   const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
   PropagateBrowserCommandLineToRenderer(browser_command_line, command_line);