Delete memory manager dead code.

content/gpu/gpu_child_thread.cc

Index: content/gpu/gpu_child_thread.cc
diff --git a/content/gpu/gpu_child_thread.cc b/content/gpu/gpu_child_thread.cc
index 8a44f4cf88b8a9f986609a980a2b65126cf9c029..b8ce0a91e385b016d2c05abc6c5e7ff1e047f369 100644
--- a/content/gpu/gpu_child_thread.cc
+++ b/content/gpu/gpu_child_thread.cc
@@ -105,8 +105,6 @@ bool GpuChildThread::OnControlMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(GpuMsg_CollectGraphicsInfo, OnCollectGraphicsInfo)
     IPC_MESSAGE_HANDLER(GpuMsg_GetVideoMemoryUsageStats,
                         OnGetVideoMemoryUsageStats)
-    IPC_MESSAGE_HANDLER(GpuMsg_SetVideoMemoryWindowCount,
-                        OnSetVideoMemoryWindowCount)
     IPC_MESSAGE_HANDLER(GpuMsg_Clean, OnClean)
     IPC_MESSAGE_HANDLER(GpuMsg_Crash, OnCrash)
     IPC_MESSAGE_HANDLER(GpuMsg_Hang, OnHang)
@@ -205,11 +203,6 @@ void GpuChildThread::OnGetVideoMemoryUsageStats() {
   Send(new GpuHostMsg_VideoMemoryUsageStats(video_memory_usage_stats));
 }
 
-void GpuChildThread::OnSetVideoMemoryWindowCount(uint32 window_count) {
-  if (gpu_channel_manager_.get())
-    gpu_channel_manager_->gpu_memory_manager()->SetWindowCount(window_count);
-}
-
 void GpuChildThread::OnClean() {
   VLOG(1) << "GPU: Removing all contexts";
   if (gpu_channel_manager_.get())