[Chromecast]Replace "device capability user agent string"

Replace it with "device type"

Merge-With: eureka-internal/635962, eureka-internal/635943
eureka-internal/635982
See eureka-internal/635962, eureka-internal/635943,
eureka-internal/635982
Bug: b/192098277

Change-Id: I1faeebf2648f3a338a817516001be225b7a48c2b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3075903
Reviewed-by: Yuchen Liu <yucliu@chromium.org>
Reviewed-by: Sean Topping <seantopping@chromium.org>
Commit-Queue: Guohui Deng <guohuideng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#909125}

diff --git a/chromecast/chromecast.gni b/chromecast/chromecast.gni
index 377080c..7695d3a 100644
--- a/chromecast/chromecast.gni
+++ b/chromecast/chromecast.gni

@@ -133,8 +133,8 @@
   # True to link in alternate build targets for the Cast Media Runtime.
   enable_cast_media_runtime = false
 
-  # Indicating whether the device has display, touch screen, etc.
-  device_capabilities = ""
+  # device specific string to append to User string.
+  device_user_agent_suffix = ""
 }
 
 declare_args() {