[Device Service] Move Gamepad Blink headers to be part of the Gamepad client library

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index b46d2dcd0377518c11582c04d63a184ea882a831..26feb7eaf37eb47366c47cc1a86d288dba48c87d 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -62,7 +62,6 @@ namespace blink {
 namespace scheduler {
 class WebThreadBase;
 }
-class WebGamepads;
 class WebMediaStreamCenter;
 class WebMediaStreamCenterClient;
 }
@@ -79,6 +78,10 @@ class SyntheticBeginFrameSource;
 class TaskGraphRunner;
 }
 
+namespace device {
+class Gamepads;
+}
+
 namespace discardable_memory {
 class ClientDiscardableSharedMemoryManager;
 }
@@ -466,7 +469,7 @@ class CONTENT_EXPORT RenderThreadImpl
   }
 
   // Retrieve current gamepad data.
-  void SampleGamepads(blink::WebGamepads* data);
+  void SampleGamepads(device::Gamepads* data);
 
   // Called by a RenderWidget when it is created or destroyed. This
   // allows the process to know when there are no visible widgets.