Handle pointer-events: none in browser process hittesting.

cc/surfaces/surface_id.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_SURFACES_SURFACE_ID_H_
 #define CC_SURFACES_SURFACE_ID_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 15 matching lines @@
 }
 
 inline bool operator!=(const SurfaceId& a, const SurfaceId& b) {
   return !(a == b);
 }
 
 inline bool operator<(const SurfaceId& a, const SurfaceId& b) {
   return a.id < b.id;
 }
 
+struct SurfaceIdHash {
+  size_t operator()(const SurfaceId& key) const {
+    return std::hash<uint64_t>()(key.id);

[dcheng, 2016/01/27 00:25:46]

#include <functional>?

[lfg, 2016/01/27 00:41:01]

Ugh, you're right. (For some reason I thought that wasn't necessary and removed
in the last patch, duh).

+  }
+};
+
 }  // namespace cc
 
 namespace BASE_HASH_NAMESPACE {
 template <>
 struct hash<cc::SurfaceId> {
   size_t operator()(cc::SurfaceId key) const {
     return hash<uint64_t>()(key.id);
   }
 };
 }  // namespace BASE_HASH_NAMESPACE
 
 #endif  // CC_SURFACES_SURFACE_ID_H_