Move content/renderer/background_sync to Blink

mojo/common/common_custom_types.mojom

 // Copyright 2016 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.
 
 module mojo.common.mojom;
 
 [Native]
 struct FilePath;
 
 [Native]
 struct ListValue;
 
 [Native]
 struct DictionaryValue;
 
-[Native]
-struct Time;
+struct Time {
+  double seconds;

[jbroman, 2016/11/21 21:36:01]

You'll want the opinion of a mojo/common/ owner, but I think I'd rather store an
int64 number of microseconds in the Mojo struct, and leave the conversion to
double for blink to do (in its traits). Basically, outside of
third_party/WebKit/ I'd be inclined to prefer Chromium's representation of
things.

+};
 
 struct TimeDelta {
   int64 microseconds;
 };
 
 [Native]
 struct TimeTicks;
 
 // Corresponds to |base::string16| in base/strings/string16.h
 // Corresponds to |WTF::String| in
 // third_party/WebKit/Source/wtf/text/WTFString.h.
 struct String16 {
   array<uint16> data;
 };
 
 // Corresponds to |base::UnguessableToken| in base/unguessable_token.h
 struct UnguessableToken {
   uint64 high;
   uint64 low;
 };
 
 // Corresponds to |base::Version| in base/version.h
 struct Version {
   array<uint32> components;
 };