Adds new experimental accessibility extension api to enable or disable native accessibility.

chrome/browser/accessibility/accessibility_extension_api.cc

Index: chrome/browser/accessibility/accessibility_extension_api.cc
diff --git a/chrome/browser/accessibility/accessibility_extension_api.cc b/chrome/browser/accessibility/accessibility_extension_api.cc
index 95ed9c2e1da86243736717f23fc84f79d9fdc3fc..662cf21e79edd2c0e8982dc6d4ad508f73a06921 100644
--- a/chrome/browser/accessibility/accessibility_extension_api.cc
+++ b/chrome/browser/accessibility/accessibility_extension_api.cc
@@ -17,6 +17,7 @@
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/common/error_utils.h"
 
@@ -179,6 +180,16 @@ bool AccessibilitySetAccessibilityEnabledFunction::RunImpl() {
   return true;
 }
 
+bool AccessibilitySetWebAccessibilityEnabledFunction::RunImpl() {
+  bool enabled;
+  EXTENSION_FUNCTION_VALIDATE(args_->GetBoolean(0, &enabled));
+  if (enabled) {

[dmazzoni, 2013/04/30 20:31:58]

Shouldn't it call something if you pass false as well?

+    content::BrowserAccessibilityState::GetInstance()->
+      OnExtensionWebAccessibilityEnabled();

[dmazzoni, 2013/04/30 20:31:58]

indent 2 more

+  }
+  return true;
+}
+
 bool AccessibilityGetFocusedControlFunction::RunImpl() {
   // Get the serialized dict from the last focused control and return it.
   // However, if the dict is empty, that means we haven't seen any focus