DO NOT MERGE libgui: Remove IGBC::BufferItem

Removes IGraphicBufferConsumer::BufferItem. Depends on the
following changes:
    I187b3a7d05196b6289596afac8fb9a9d4aebff76
    I0ddd38df37500cfd6b21d1e768ed14e39c5cd9fc

Cherry-pick of Id1fa56d092188f2cb712768d5d2fc6a9027fb73c

Change-Id: I3edf0db8fba656fd78e18a5a7f1137f0fb6b237d
diff --git a/include/gui/BufferItemConsumer.h b/include/gui/BufferItemConsumer.h
index 57e121e..930fabf 100644
--- a/include/gui/BufferItemConsumer.h
+++ b/include/gui/BufferItemConsumer.h
@@ -42,8 +42,6 @@
   public:
     typedef ConsumerBase::FrameAvailableListener FrameAvailableListener;
 
-    typedef BufferQueue::BufferItem BufferItem;
-
     enum { DEFAULT_MAX_BUFFERS = -1 };
     enum { INVALID_BUFFER_SLOT = BufferQueue::INVALID_BUFFER_SLOT };
     enum { NO_BUFFER_AVAILABLE = BufferQueue::NO_BUFFER_AVAILABLE };
@@ -76,9 +74,7 @@
     //
     // If waitForFence is true, and the acquired BufferItem has a valid fence object,
     // acquireBuffer will wait on the fence with no timeout before returning.
-    status_t acquireBuffer(BufferQueue::BufferItem *item, nsecs_t presentWhen,
-            bool waitForFence = true);
-    status_t acquireBuffer(android::BufferItem* item, nsecs_t presentWhen,
+    status_t acquireBuffer(BufferItem* item, nsecs_t presentWhen,
             bool waitForFence = true);
 
     // Returns an acquired buffer to the queue, allowing it to be reused. Since