Prepare SyntheticPointerAction to handle mouse actions

content/browser/renderer_host/input/synthetic_pointer_action.cc

Index: content/browser/renderer_host/input/synthetic_pointer_action.cc
diff --git a/content/browser/renderer_host/input/synthetic_pointer_action.cc b/content/browser/renderer_host/input/synthetic_pointer_action.cc
index 76eb44387ba4f7ad8922eaad92524a6a83e87be8..a701ce51f0281ea0165a6d4c803d16f93e797dc3 100644
--- a/content/browser/renderer_host/input/synthetic_pointer_action.cc
+++ b/content/browser/renderer_host/input/synthetic_pointer_action.cc
@@ -77,10 +77,15 @@ bool SyntheticPointerAction::UserInputCheck(
     return false;
   }
 
-  if ((params.pointer_action_type() ==
-           SyntheticPointerActionParams::PointerActionType::MOVE ||
-       params.pointer_action_type() ==
-           SyntheticPointerActionParams::PointerActionType::RELEASE) &&
+  if (synthetic_pointer_->SourceType() == SyntheticGestureParams::TOUCH_INPUT &&

[tdresser, 2016/08/04 13:46:01]

This should also hold true for mouse, shouldn't it?

[lanwei, 2016/09/23 15:13:42]

For mouse, the move can be happened without a press first, so we do not need
this check for mouse.

+      params.pointer_action_type() ==
+          SyntheticPointerActionParams::PointerActionType::MOVE &&
+      GetPointIndex(params.index()) < 0) {
+    return false;
+  }
+
+  if (params.pointer_action_type() ==
+          SyntheticPointerActionParams::PointerActionType::RELEASE &&
       GetPointIndex(params.index()) < 0) {
     return false;
   }