Adds a chrome://accessibility page, which:

Adds a toggle for global accessibility mode (on/off)
For each renderer:
- shows an accessibility mode toggle
- if accessibility mode is On, shows a 'Show(/hide) accessibility tree' toggle, which shows(/hides) a text representation of the accessibility tree inline in the page. The accessibility tree may also be refreshed.

BUG=178756

Review URL: https://chromiumcodereview.appspot.com/11791028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@187417 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 9 insertions, 0 deletions

diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 176784c..716227a 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -148,6 +148,7 @@ RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
       waiting_for_screen_rects_ack_(false),
       mouse_move_pending_(false),
       mouse_wheel_pending_(false),
+      accessibility_mode_(AccessibilityModeOff),
       select_range_pending_(false),
       move_caret_pending_(false),
       needs_repainting_on_restore_(false),
@@ -2217,6 +2218,7 @@ void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
 }
 
 void RenderWidgetHostImpl::SetAccessibilityMode(AccessibilityMode mode) {
+  accessibility_mode_ = mode;
   Send(new ViewMsg_SetAccessibilityMode(routing_id_, mode));
 }
 
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 61d8bfd..9485aa8 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -328,6 +328,11 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   void SetEditCommandsForNextKeyEvent(
       const std::vector<EditCommand>& commands);
 
+  // Gets the accessibility mode.
+  AccessibilityMode accessibility_mode() const {
+    return accessibility_mode_;
+  }
+
   // Send a message to the renderer process to change the accessibility mode.
   void SetAccessibilityMode(AccessibilityMode mode);
 
@@ -738,6 +743,8 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   // would be queued) results in very slow scrolling.
   WheelEventQueue coalesced_mouse_wheel_events_;
 
+  AccessibilityMode accessibility_mode_;
+
   // (Similar to |mouse_move_pending_|.) True while waiting for SelectRange_ACK.
   bool select_range_pending_;