media: Use stl utilities from the base namespace

media/filters/gpu_video_decoder.cc

Index: media/filters/gpu_video_decoder.cc
diff --git a/media/filters/gpu_video_decoder.cc b/media/filters/gpu_video_decoder.cc
index d62b50f110582f32da6c31be0b8cf7749372f8f9..d323e0f38e8869225bc85da6fda93345dced462d 100644
--- a/media/filters/gpu_video_decoder.cc
+++ b/media/filters/gpu_video_decoder.cc
@@ -402,7 +402,8 @@ void GpuVideoDecoder::Decode(const scoped_refptr<DecoderBuffer>& buffer,
 
   // Mask against 30 bits, to avoid (undefined) wraparound on signed integer.
   next_bitstream_buffer_id_ = (next_bitstream_buffer_id_ + 1) & 0x3FFFFFFF;
-  DCHECK(!ContainsKey(bitstream_buffers_in_decoder_, bitstream_buffer.id()));
+  DCHECK(
+      !base::ContainsKey(bitstream_buffers_in_decoder_, bitstream_buffer.id()));
   bitstream_buffers_in_decoder_.insert(std::make_pair(
       bitstream_buffer.id(),
       PendingDecoderBuffer(shm_buffer.release(), buffer, decode_cb)));