[chromecast] Add Product sku name to cast sys info.

Bug: internal b/159937174
Test: CQ, build chromecast
Merge-With: eureka-internal/423679
Change-Id: I993eea66d26b410f7bacffac9b971f986fd01ce4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2293105
Commit-Queue: JinJie Chen <jinjiechen@google.com>
Reviewed-by: Yuchen Liu <yucliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#788400}

chromecast/public/cast_sys_info.h

@@ -36,6 +36,10 @@ class CastSysInfo {
   virtual std::string GetSerialNumber() = 0;
   // Returns product code name of the device.
   virtual std::string GetProductName() = 0;
+  // Returns product sku code name of the device.
+  static CHROMECAST_EXPORT std::string GetProductSkuName(
+      CastSysInfo* cast_sys_info) __attribute__((__weak__));
+
   // Returns model name of device (eg: Chromecast, Nexus Player, ...).
   virtual std::string GetDeviceModel() = 0;
   // Returns the board's name.