Export the tracer http.RoundTripper instead.

Fixes #639.

Change-Id: I459d80748fc8c822a708260eb6832b38bd7012b3
Reviewed-on: https://code-review.googlesource.com/13790
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Ross Light <light@google.com>

The Recorder type, and support for unary (non-stream) RPCs.

Change-Id: Ibd13b183991755de2016ceb7736e0da518b57ad3
Reviewed-on: https://code-review.googlesource.com/13810
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Michael Darakananda <pongad@google.com>

Change-Id: I323764b7c1577d468ec3cfbc1ef4718d0a63f3b8
Reviewed-on: https://code-review.googlesource.com/13891
Reviewed-by: Jonathan Amsterdam <jba@google.com>

This test should not need to retry, because object listing is strongly
consistent (see https://cloud.google.com/storage/docs/consistency).

We added the retry because it failed sometimes. I have not been able
to reproduce a failure.

Change-Id: Ib93af979ad414677eb1e885afd020eac05a0dc89
Reviewed-on: https://code-review.googlesource.com/13892
Reviewed-by: Ross Light <light@google.com>
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Sarah Adams <shadams@google.com>

Change-Id: I56f67065e10e0387a99bc297a73f2fec4bfbf6e9
Reviewed-on: https://code-review.googlesource.com/13910
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jaana Burcu Dogan <jbd@google.com>

h/t Bo0mer, PR #669.

Change-Id: I0494c3c57c6d59e9afef08e40176465e13488cd2
Reviewed-on: https://code-review.googlesource.com/13893
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jaana Burcu Dogan <jbd@google.com>

If an RPC returns an error that we don't know how to write out,
mark the Recorder as failed and return an error from then on.

Change-Id: I439ae8c77a606dc62eb5064cb07b7762131c037c
Reviewed-on: https://code-review.googlesource.com/13831
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Michael Darakananda <pongad@google.com>

Change-Id: I4508331fc84d7881294618f0a6381a96b0ba6307
Reviewed-on: https://code-review.googlesource.com/13990
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>

These correspond to the desired Spanner Client Test Cases
for read failures and various query cases.

Change-Id: Idc398b3319e71de616a008ec7263240e0168cd39
Reviewed-on: https://code-review.googlesource.com/13930
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Michael Darakananda <pongad@google.com>

Change-Id: I479d884115e159b2f92b98a2ae0af948194583f5
Reviewed-on: https://code-review.googlesource.com/13890
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Michael Darakananda <pongad@google.com>

Change-Id: Ib44b8d076f973152c3066c40b1d84f0db2d825b3
Reviewed-on: https://code-review.googlesource.com/14013
Reviewed-by: Jonathan Amsterdam <jba@google.com>

This is enabled by the closing of grpc/grpc-go#1087.

Change-Id: Ia54c13b6db5fe20f2818e366f0ca31a2146cb403
Reviewed-on: https://code-review.googlesource.com/14011
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>

Fixes #672.

Change-Id: I99e0a3b2cc074961d1fd733de88d28e476051490
Reviewed-on: https://code-review.googlesource.com/14012
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>

Two functions for debugging.

Change-Id: I20bc39fdc6270ad7d75edf85d03e090be57d0d1e
Reviewed-on: https://code-review.googlesource.com/14014
Reviewed-by: Michael Darakananda <pongad@google.com>

grpc-trace-bin is the defacto metadata key for trace contexts
proagated via gRPC calls to be understood by Google load
balancers and Cloud products.

Change-Id: I0171df9aef2ae9949dcdd2ace635d1c228a3f03d
Reviewed-on: https://code-review.googlesource.com/13730
Reviewed-by: Ross Light <light@google.com>

Fixes #656.

Change-Id: I8344ac86ca3d46ec0b6fb264efa76b8100c6958f
Reviewed-on: https://code-review.googlesource.com/14050
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>

BREAK: logging: LoggingProjectPath and LoggingLogPath functions are
renamed ProjectPath and LogPath, respectively.

BREAK: videointelligence: The type VideoIntelligenceClient is renamed
Client.

logging: idempotent RPCs can be retried on INTERNAL error. Fixes #517.

all: fix iterator examples. Fixes #657.

Change-Id: I1c69f5e2ae681fb4a5d914cdc5e0d67d8b83c02e
Reviewed-on: https://code-review.googlesource.com/13951
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>