gRPC migration

Change-Id: Ib390f6dde0d5a8d6db12ccd7da41135570ad1354
diff --git a/vendor/google.golang.org/grpc/grpclog/loggerv2.go b/vendor/google.golang.org/grpc/grpclog/loggerv2.go
index 23612b7..d493257 100644
--- a/vendor/google.golang.org/grpc/grpclog/loggerv2.go
+++ b/vendor/google.golang.org/grpc/grpclog/loggerv2.go
@@ -24,8 +24,6 @@
 	"log"
 	"os"
 	"strconv"
-
-	"google.golang.org/grpc/internal/grpclog"
 )
 
 // LoggerV2 does underlying logging work for grpclog.
@@ -67,8 +65,7 @@
 // SetLoggerV2 sets logger that is used in grpc to a V2 logger.
 // Not mutex-protected, should be called before any gRPC functions.
 func SetLoggerV2(l LoggerV2) {
-	grpclog.Logger = l
-	grpclog.DepthLogger, _ = l.(grpclog.DepthLoggerV2)
+	logger = l
 }
 
 const (
@@ -196,19 +193,3 @@
 func (g *loggerT) V(l int) bool {
 	return l <= g.v
 }
-
-// DepthLoggerV2 logs at a specified call frame. If a LoggerV2 also implements
-// DepthLoggerV2, the below functions will be called with the appropriate stack
-// depth set for trivial functions the logger may ignore.
-//
-// This API is EXPERIMENTAL.
-type DepthLoggerV2 interface {
-	// InfoDepth logs to INFO log at the specified depth. Arguments are handled in the manner of fmt.Print.
-	InfoDepth(depth int, args ...interface{})
-	// WarningDepth logs to WARNING log at the specified depth. Arguments are handled in the manner of fmt.Print.
-	WarningDepth(depth int, args ...interface{})
-	// ErrorDetph logs to ERROR log at the specified depth. Arguments are handled in the manner of fmt.Print.
-	ErrorDepth(depth int, args ...interface{})
-	// FatalDepth logs to FATAL log at the specified depth. Arguments are handled in the manner of fmt.Print.
-	FatalDepth(depth int, args ...interface{})
-}