[mojo-edk] Expose notification source to MojoWatch callbacks

mojo/edk/system/wait_set_dispatcher_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/edk/system/wait_set_dispatcher.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/system/core.h"
 #include "mojo/edk/system/message_pipe_dispatcher.h"
+#include "mojo/edk/system/request_context.h"
 #include "mojo/edk/system/test_utils.h"
 #include "mojo/edk/system/waiter.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace edk {
 namespace {
 
 class WaitSetDispatcherTest : public ::testing::Test {
  public:
-  WaitSetDispatcherTest() {}
+  WaitSetDispatcherTest()
+      : request_context_(RequestContext::Source::LOCAL_API_CALL) {}
   ~WaitSetDispatcherTest() override {}
 
   void SetUp() override {
     CreateMessagePipe(&dispatcher0_, &dispatcher1_);
   }
 
   void TearDown() override {
     for (auto& d : dispatchers_to_close_)
       d->Close();
   }
@@ skipping 33 matching lines @@
 
   void CloseOnShutdown(const scoped_refptr<Dispatcher>& dispatcher) {
     dispatchers_to_close_.push_back(dispatcher);
   }
 
  protected:
   scoped_refptr<MessagePipeDispatcher> dispatcher0_;
   scoped_refptr<MessagePipeDispatcher> dispatcher1_;
 
  private:
+  // We keep an active RequestContext for the duration of each test. It's unused
+  // since these tests don't rely on the MojoWatch API.
+  const RequestContext request_context_;
+
   static uint64_t pipe_id_generator_;
   DispatcherVector dispatchers_to_close_;
 
   DISALLOW_COPY_AND_ASSIGN(WaitSetDispatcherTest);
 };
 
 // static
 uint64_t WaitSetDispatcherTest::pipe_id_generator_ = 1;
 
 TEST_F(WaitSetDispatcherTest, Basic) {
@@ skipping 366 matching lines @@
   EXPECT_EQ(MOJO_RESULT_OK,
             GetOneReadyDispatcher(wait_set, &woken_dispatcher, nullptr));
   EXPECT_EQ(nested_wait_set, woken_dispatcher);
 
   wait_set->RemoveAwakable(&w, nullptr);
 }
 
 }  // namespace
 }  // namespace edk
 }  // namespace mojo