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

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index 919115addebd1235ce807abf1cfa5207785140f2..d28a69c7428323c3fdd678115314be176dfcc3e2 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -11,6 +11,7 @@
 
 #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"
@@ -293,6 +294,15 @@ class CONTENT_EXPORT RenderProcessHostImpl
   // 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_;