Prepare SyntheticPointerAction to handle touch actions for multiple fingers

content/browser/renderer_host/input/synthetic_gesture.cc

Index: content/browser/renderer_host/input/synthetic_gesture.cc
diff --git a/content/browser/renderer_host/input/synthetic_gesture.cc b/content/browser/renderer_host/input/synthetic_gesture.cc
index b334af104d550d88e052506920b45d32a7affe42..429e62a2b083d4bed0a6c8a1b4131b5643660025 100644
--- a/content/browser/renderer_host/input/synthetic_gesture.cc
+++ b/content/browser/renderer_host/input/synthetic_gesture.cc
@@ -43,12 +43,10 @@ std::unique_ptr<SyntheticGesture> SyntheticGesture::Create(
     case SyntheticGestureParams::TAP_GESTURE:
       return CreateGesture<SyntheticTapGesture,
                            SyntheticTapGestureParams>(gesture_params);
-    case SyntheticGestureParams::POINTER_ACTION:
-      return CreateGesture<SyntheticPointerAction,
-                           SyntheticPointerActionParams>(gesture_params);
+    default:
+      NOTREACHED() << "Invalid synthetic gesture type";
+      return std::unique_ptr<SyntheticGesture>();

[dcheng, 2016/07/13 12:18:12]

Nit: this can be written as return nullptr

[lanwei, 2016/07/14 17:05:54]

Acknowledged.

   }
-  NOTREACHED() << "Invalid synthetic gesture type";
-  return std::unique_ptr<SyntheticGesture>();
 }
 
 }  // namespace content