Optimize EventHub reads.

Change-Id: Id7d09c0a6e5c741c1e29becd2b6560772c5ff372
diff --git a/include/ui/EventHub.h b/include/ui/EventHub.h
index dab35b3..3132941 100644
--- a/include/ui/EventHub.h
+++ b/include/ui/EventHub.h
@@ -266,6 +266,12 @@
 #ifdef EV_SW
     int32_t         mSwitches[SW_MAX + 1];
 #endif
+
+    static const int INPUT_BUFFER_SIZE = 64;
+    struct input_event mInputBufferData[INPUT_BUFFER_SIZE];
+    int32_t mInputBufferIndex;
+    int32_t mInputBufferCount;
+    int32_t mInputDeviceIndex;
 };
 
 }; // namespace android