Undeprecate PPAPI WebSocket

Remove the deprecation console message and documentation comments for
PPAPI WebSocket. This is mostly a straightforward revert of
https://chromium-review.googlesource.com/c/chromium/src/+/1161712/
except that the enums have been left behind.

See
https://groups.google.com/a/chromium.org/d/msg/blink-dev/lWNvY56OAYs/9IoQx_ncDQAJ
for the background and justification for undoing the deprecation.

BUG=870586

Change-Id: I436e016b98e5e6224fca420ed769420f016bf6ac
Reviewed-on: https://chromium-review.googlesource.com/c/1402306
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Nate Chapin <japhet@chromium.org>
Commit-Queue: Adam Rice <ricea@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#622756}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: dfc22b6813741d7ca31a5c0debe2201bb553b483
diff --git a/api/ppb_websocket.idl b/api/ppb_websocket.idl
index 3324e50..d006d28 100644
--- a/api/ppb_websocket.idl
+++ b/api/ppb_websocket.idl
@@ -177,8 +177,6 @@
 /** 
  * The <code>PPB_WebSocket</code> interface provides bi-directional,
  * full-duplex, communications over a single TCP socket.
- *
- * This interface is deprecated and scheduled to be removed in mid-2019.
  */
 interface PPB_WebSocket {
   /**
diff --git a/c/ppb_websocket.h b/c/ppb_websocket.h
index db9c4d5..7f02a26 100644
--- a/c/ppb_websocket.h
+++ b/c/ppb_websocket.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From ppb_websocket.idl modified Fri Aug  3 14:53:49 2018. */
+/* From ppb_websocket.idl modified Thu May 31 15:47:38 2012. */
 
 #ifndef PPAPI_C_PPB_WEBSOCKET_H_
 #define PPAPI_C_PPB_WEBSOCKET_H_
@@ -178,8 +178,6 @@
 /**
  * The <code>PPB_WebSocket</code> interface provides bi-directional,
  * full-duplex, communications over a single TCP socket.
- *
- * This interface is deprecated and scheduled to be removed in mid-2019.
  */
 struct PPB_WebSocket_1_0 {
   /**
diff --git a/cpp/websocket.h b/cpp/websocket.h
index b85387e..c1c78b0 100644
--- a/cpp/websocket.h
+++ b/cpp/websocket.h
@@ -27,7 +27,6 @@
 
 /// The <code>WebSocket</code> class providing bi-directional,
 /// full-duplex, communications over a single TCP socket.
-/// This class is deprecated and will be removed in mid 2019.
 class WebSocket : public Resource {
  public:
   /// Constructs a WebSocket object.
diff --git a/utility/websocket/websocket_api.h b/utility/websocket/websocket_api.h
index a3f9d7a..3fd62ea 100644
--- a/utility/websocket/websocket_api.h
+++ b/utility/websocket/websocket_api.h
@@ -17,8 +17,7 @@
 class Instance;
 class Var;
 
-/// The <code>WebSocketAPI</code> class.
-/// This class is deprecated and will be removed in mid-2019.
+/// The <code>WebSocketAPI</code> class
 class WebSocketAPI {
  public:
   /// Constructs a WebSocketAPI object.