Make touch accessibility gestures work with ChromeVox Next

chrome/common/extensions/api/accessibility_private.json

Index: chrome/common/extensions/api/accessibility_private.json
diff --git a/chrome/common/extensions/api/accessibility_private.json b/chrome/common/extensions/api/accessibility_private.json
index a43cf9af53abdf3f20282b1241c05108f1135e0c..abe841ebe990debac00719c91c9ae617ead7e7a2 100644
--- a/chrome/common/extensions/api/accessibility_private.json
+++ b/chrome/common/extensions/api/accessibility_private.json
@@ -82,6 +82,17 @@
         "name": "onIntroduceChromeVox",
         "type": "function",
         "description": "Fired whenever ChromeVox should output introduction."
+      },
+      {
+        "name": "onAccessibilityGesture",
+        "type": "function",
+        "description": "Fired when an accessibility gesture is detected by the touch exploration controller.",
+        "parameters": [
+          {
+            "name": "gesture",
+            "type": "string"

[asargent_no_longer_on_chrome, 2016/05/09 19:04:54]

optional suggestion: since the values of this come from an enum in C++, you can
add a "enum" key here mapped to a list of the possible strings, and then you'll
get validity checking from the bindings layer for free (also documentation
nicety, although I guess that doesn't matter for a private API since we don't
generate docs for it). 

[dmazzoni, 2016/05/09 20:03:33]

Done.

+          }
+        ]
       }
     ]
   }