Move content/renderer/background_sync to Blink

mojo/common/common_custom_types.mojom

Index: mojo/common/common_custom_types.mojom
diff --git a/mojo/common/common_custom_types.mojom b/mojo/common/common_custom_types.mojom
index 203fa3c844d7283d0570cb03f5d6513d315a0906..16c684e23680ba07a2ea31afa9ce3022fc6f4a1a 100644
--- a/mojo/common/common_custom_types.mojom
+++ b/mojo/common/common_custom_types.mojom
@@ -13,8 +13,9 @@ 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;