Separate WireServer.cpp into multiple files.

This patch copies methods and classes from WireServer.cpp and
distributes them over multiple files. Headers and forward declarations
are added as necessary, but no functional changes are made.

Bug: dawn:88
Change-Id: I471b8c27804916257eff266a51d087ba1ddbfeb6
Reviewed-on: https://dawn-review.googlesource.com/c/4000
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>

src/dawn_wire/server/ServerQueue.cpp

@@ -0,0 +1,39 @@
+// Copyright 2019 The Dawn Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "common/Assert.h"
+#include "dawn_wire/server/Server.h"
+
+namespace dawn_wire { namespace server {
+
+    bool Server::PostHandleQueueSignal(const QueueSignalCmd& cmd) {
+        if (cmd.fence == nullptr) {
+            return false;
+        }
+        ObjectId fenceId = mFenceIdTable.Get(cmd.fence);
+        ASSERT(fenceId != 0);
+        auto* fence = mKnownFence.Get(fenceId);
+        ASSERT(fence != nullptr);
+
+        auto* data = new FenceCompletionUserdata;
+        data->server = this;
+        data->fence = ObjectHandle{fenceId, fence->serial};
+        data->value = cmd.signalValue;
+
+        auto userdata = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(data));
+        mProcs.fenceOnCompletion(cmd.fence, cmd.signalValue, ForwardFenceCompletedValue, userdata);
+        return true;
+    }
+
+}}  // namespace dawn_wire::server