Fix WebView compositor input handling

content/renderer/gpu/input_event_filter.cc

Index: content/renderer/gpu/input_event_filter.cc
diff --git a/content/renderer/gpu/input_event_filter.cc b/content/renderer/gpu/input_event_filter.cc
index 96a7034af160537f5c18054574e561c4d8094552..29a7621b13e6b065c6017a5b118ac5c1982b70ac 100644
--- a/content/renderer/gpu/input_event_filter.cc
+++ b/content/renderer/gpu/input_event_filter.cc
@@ -6,13 +6,30 @@
 #include "base/debug/trace_event.h"
 #include "base/location.h"
 #include "base/message_loop_proxy.h"
+#include "content/common/child_thread.h"
 #include "content/common/input_messages.h"
 #include "content/renderer/gpu/input_event_filter.h"
+#include "ipc/ipc_sync_channel.h"
+
+#if defined(OS_ANDROID)
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+#include <sys/resource.h>
+#endif
 
 using WebKit::WebInputEvent;
 
 namespace content {
 
+#if defined(OS_ANDROID)
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+namespace {
+void SetHighThreadPriority() {
+  int nice_value = -6; // High priority.
+  setpriority(PRIO_PROCESS, base::PlatformThread::CurrentId(), nice_value);
+}
+}
+#endif
+
 InputEventFilter::InputEventFilter(
     IPC::Listener* main_listener,
     const scoped_refptr<base::MessageLoopProxy>& target_loop,
@@ -24,14 +41,18 @@ InputEventFilter::InputEventFilter(
       handler_(handler) {
   DCHECK(target_loop_);
   DCHECK(!handler_.is_null());
+#if defined(OS_ANDROID)
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+  target_loop->PostTask(FROM_HERE, base::Bind(&SetHighThreadPriority));
+#endif
 }
 
-void InputEventFilter::AddRoute(int routing_id) {
+void InputEventFilter::DidAddInputHandler(int routing_id) {
   base::AutoLock locked(routes_lock_);
   routes_.insert(routing_id);
 }
 
-void InputEventFilter::RemoveRoute(int routing_id) {
+void InputEventFilter::DidRemoveInputHandler(int routing_id) {
   base::AutoLock locked(routes_lock_);
   routes_.erase(routing_id);
 }