[Android] Upstream the WebView find-in-page API implementation.

content/browser/renderer_host/render_process_host_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_
 
 #include <map>
 #include <queue>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
+#include "base/synchronization/waitable_event.h"
 #include "base/timer.h"
 #include "content/browser/child_process_launcher.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/render_process_host.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ui/surface/transport_dib.h"
 
 class CommandLine;
 
 namespace gfx {
@@ skipping 262 matching lines @@
   // the same process doesn't.
   bool sudden_termination_allowed_;
 
   // Set to true if we shouldn't send input events.  We actually do the
   // filtering for this at the render widget level.
   bool ignore_input_events_;
 
   // Records the last time we regarded the child process active.
   base::TimeTicks child_process_activity_time_;
 
+#if defined(OS_ANDROID)
+  // Android WebView needs to use a SyncChannel to block the browser process
+  // for synchronous find-in-page API support. In that case the shutdown event
+  // makes no sense as the Android port doesn't shutdown, but gets killed.
+  // SyncChannel still expects a shutdown event, so create a dummy one that
+  // will never will be signaled.
+  base::WaitableEvent dummy_shutdown_event_;
+#endif
+
   // Indicates whether this is a RenderProcessHost of a Browser Plugin guest
   // renderer.
   bool is_guest_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_BROWSER_RENDER_PROCESS_HOST_IMPL_H_