Connect HostEventDispatcher to InputInjector for touch events

- Implement InjectTouchEvent() methods for the code used by
  the host side so that events from HostEventDispatcher gets
  propagated to InputInjector.
- Add protocol/test_event_matchers.h for sharing matchers
  across tests.

BUG=314515

Review URL: https://codereview.chromium.org/947643002

Cr-Commit-Position: refs/heads/master@{#319386}

1 files changed, 13 insertions, 0 deletions

diff --git a/remoting/host/desktop_session_proxy.cc b/remoting/host/desktop_session_proxy.cc
index b321655..7d1fc7e4 100644
--- a/remoting/host/desktop_session_proxy.cc
+++ b/remoting/host/desktop_session_proxy.cc
@@ -386,6 +386,19 @@ void DesktopSessionProxy::InjectMouseEvent(const protocol::MouseEvent& event) {
       new ChromotingNetworkDesktopMsg_InjectMouseEvent(serialized_event));
 }
 
+void DesktopSessionProxy::InjectTouchEvent(const protocol::TouchEvent& event) {
+  DCHECK(caller_task_runner_->BelongsToCurrentThread());
+
+  std::string serialized_event;
+  if (!event.SerializeToString(&serialized_event)) {
+    LOG(ERROR) << "Failed to serialize protocol::TouchEvent.";
+    return;
+  }
+
+  SendToDesktop(
+      new ChromotingNetworkDesktopMsg_InjectTouchEvent(serialized_event));
+}
+
 void DesktopSessionProxy::StartInputInjector(
     scoped_ptr<protocol::ClipboardStub> client_clipboard) {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());