Correctly sets provisioning state for test.

[ Merge from http://go/wvgerrit/78383 ]

Bug: http://b/121049662

Test: Re-ran the unit test.
Change-Id: I62c00f425c93b588e123ddd8b1093177f2e9b241

libwvdrmengine/cdm/test/wv_cdm_metrics_test.cpp

@@ -5,6 +5,7 @@
 // This file contains unit tests for the WvContentDecryptionModule class
 // that pertain to collecting and reporting metrics.
 
+#include "cdm_identifier.h"
 #include "gmock/gmock.h"
 #include "log.h"
 #include "metrics.pb.h"
@@ -32,9 +33,12 @@ namespace wvcdm {
 
 // This class is used to test the metrics-related feaures of the
 // WvContentDecryptionModule class.
-class WvContentDecryptionModuleMetricsTest : public ::testing::Test {
+class WvContentDecryptionModuleMetricsTest : public WvCdmTestBase {
  protected:
-
+  void Unprovision(CdmIdentifier identifier) {
+    EXPECT_EQ(NO_ERROR, decryptor_.Unprovision(kSecurityLevelL1, identifier));
+    EXPECT_EQ(NO_ERROR, decryptor_.Unprovision(kSecurityLevelL3, identifier));
+  }
   wvcdm::WvContentDecryptionModule decryptor_;
 };
 
@@ -92,6 +96,7 @@ TEST_F(WvContentDecryptionModuleMetricsTest, EngineOnlyMetrics) {
 TEST_F(WvContentDecryptionModuleMetricsTest, EngineAndSessionMetrics) {
   CdmSessionId session_id;
   wvcdm::CdmKeySystem key_system("com.widevine");
+  Unprovision(kDefaultCdmIdentifier);
 
   // Openning the session will fail with NEEDS_PROVISIONING error. But it will
   // still create some session-level stats.
@@ -138,6 +143,12 @@ TEST_F(WvContentDecryptionModuleMetricsTest,
                                 // as the one above except for the unique_id.
                                 { "foo", "bar", "baz", 8 }};
   const int cdm_engine_count = 3;
+
+  // Force Unprovision.
+  for (int i = 0; i < cdm_engine_count; i++) {
+    Unprovision(identifiers[i]);
+  }
+
   for (int i = 0; i < cdm_engine_count; i++) {
     // To make sure we can detect different engine metrics,
     // make the open session call a different number of times for