Adding Chrome-side WebVR interface

content/common/vr_param_traits.cc

Index: content/common/vr_param_traits.cc
diff --git a/content/common/vr_param_traits.cc b/content/common/vr_param_traits.cc
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index 0000000000000000000000000000000000000000..2cbc41890576dfa2f6497873ca87ebeba58965c9
--- /dev/null
+++ b/content/common/vr_param_traits.cc
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+// Copyright 2015 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.
+
+#include "content/common/vr_param_traits.h"
+
+#include "base/pickle.h"
+#include "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
+#include "ipc/ipc_message_utils.h"
+#include "third_party/WebKit/public/platform/WebVR.h"
+
+using blink::WebVRDevice;
+
+namespace {
+
+void LogWebUCharString(

[mdempsky, 2015/05/11 19:25:01]

(I'm surprised this functionality doesn't already exist somewhere in Chromium?)

+    const blink::WebUChar web_string[],
+    const size_t array_size,
+    std::string* log) {
+  base::string16 utf16;
+  utf16.reserve(array_size);
+  for (size_t i = 0; i < array_size && web_string[i]; ++i) {
+    utf16[i] = web_string[i];
+  }
+  log->append(base::UTF16ToUTF8(utf16));
+}
+
+}

[mdempsky, 2015/05/11 19:25:01]

Nit: "// namespace".

+
+namespace IPC {
+
+void ParamTraits<WebVRDevice>::Write(
+    Message* m,
+    const WebVRDevice& p) {
+  m->WriteData(reinterpret_cast<const char*>(&p), sizeof(WebVRDevice));
+}
+
+bool ParamTraits<WebVRDevice>::Read(
+    const Message* m,
+    PickleIterator* iter,
+    WebVRDevice* p) {
+  int length;
+  const char* data;
+  if (!iter->ReadData(&data, &length) || length != sizeof(WebVRDevice))
+    return false;
+  memcpy(p, data, sizeof(WebVRDevice));
+
+  return true;
+}
+
+void ParamTraits<WebVRDevice>::Log(
+    const WebVRDevice& p,
+    std::string* l) {
+  l->append("WebVRDevice(");
+  LogParam(p.index, l);
+  LogWebUCharString(p.deviceName, WebVRDevice::deviceNameLengthCap, l);

[mdempsky, 2015/05/11 19:25:01]

Should there be delimiters between the logged fields?

+  LogParam(p.flags, l);
+  // TODO(bajones): Log the WebVRHMDInfo struct
+  l->append(")");
+}
+
+} // namespace IPC