Update navigator.share API to match draft specs.

third_party/WebKit/Source/modules/webshare/ShareData.idl

Index: third_party/WebKit/Source/modules/webshare/ShareData.idl
diff --git a/cc/ipc/render_pass_id.mojom b/third_party/WebKit/Source/modules/webshare/ShareData.idl
similarity index 53%
copy from cc/ipc/render_pass_id.mojom
copy to third_party/WebKit/Source/modules/webshare/ShareData.idl
index 90eee184925025d5d948c49e6af692ec5ec2a04e..9bb123ccbb7d6ecc986e795391c0e037dc4a036f 100644
--- a/cc/ipc/render_pass_id.mojom
+++ b/third_party/WebKit/Source/modules/webshare/ShareData.idl
@@ -2,9 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module cc.mojom;
+// https://github.com/WICG/web-share/blob/master/docs/interface.md
 
-struct RenderPassId {
-  int32 layer_id;
-  uint32 index;
+dictionary ShareData {
+  DOMString? title;
+  DOMString? text;
+  DOMString? url;
 };