First semi-successful attempt at mac accessibility.

Right now the accessibility tree is shipped over at page load, so this doesn't account for any changes to the html, or scrolling/resizing.

BUG=27112
TEST=Use accessibility inspector to inspect various elements of the webpage.

Review URL: http://codereview.chromium.org/2642001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@51782 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 7886e49c..bdbad710 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -600,6 +600,9 @@
         'browser/cocoa/base_bubble_controller.mm',
         'browser/cocoa/base_view.h',
         'browser/cocoa/base_view.mm',
+        'browser/cocoa/browser_accessibility.h',
+        'browser/cocoa/browser_accessibility.mm',
+        'browser/cocoa/browser_accessibility_delegate.h',
         'browser/cocoa/browser_window_factory.mm',
         'browser/cocoa/bookmark_all_tabs_controller.h',
         'browser/cocoa/bookmark_all_tabs_controller.mm',