Allow MessageFilters to restrict listening to specific message classes

content/browser/renderer_host/input/touch_input_browsertest.cc

 // Copyright 2013 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 "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/run_loop.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/input/synthetic_web_input_event_builders.h"
@@ skipping 64 matching lines @@
     "  }"
     "</script>";
 
 }  // namespace
 
 namespace content {
 
 class InputEventMessageFilter : public BrowserMessageFilter {
  public:
   InputEventMessageFilter()
-      : type_(WebInputEvent::Undefined),
+      : BrowserMessageFilter(InputMsgStart),
+        type_(WebInputEvent::Undefined),
         state_(INPUT_EVENT_ACK_STATE_UNKNOWN) {}
 
   void WaitForAck(WebInputEvent::Type type) {
     base::RunLoop run_loop;
     base::AutoReset<base::Closure> reset_quit(&quit_, run_loop.QuitClosure());
     base::AutoReset<WebInputEvent::Type> reset_type(&type_, type);
     run_loop.Run();
   }
 
   InputEventAckState last_ack_state() const { return state_; }
@@ skipping 172 matching lines @@
 INSTANTIATE_TEST_CASE_P(WithoutInputHandlerProxy, TouchInputBrowserTest,
     ::testing::Values(std::string(switches::kDisableThreadedCompositing)));
 #endif
 
 #if defined(USE_AURA) || defined(OS_MACOSX)
 INSTANTIATE_TEST_CASE_P(WithInputHandlerProxy, TouchInputBrowserTest,
     ::testing::Values(std::string(switches::kEnableThreadedCompositing)));
 #endif
 
 }  // namespace content