Cleanup: rename usage_mask --> usages.

This is a simple search and replace:
  s/usage_mask/usages/g

There was some inconsistenty on when variables were called "usages" versus "usage_mask"; now they all read "usages".

Review URL: https://codereview.chromium.org/670773003

Cr-Commit-Position: refs/heads/master@{#300533}
diff --git a/content/child/webcrypto/algorithm_implementation.cc b/content/child/webcrypto/algorithm_implementation.cc
index e54f292..b815a52 100644
--- a/content/child/webcrypto/algorithm_implementation.cc
+++ b/content/child/webcrypto/algorithm_implementation.cc
@@ -55,14 +55,14 @@
 Status AlgorithmImplementation::GenerateKey(
     const blink::WebCryptoAlgorithm& algorithm,
     bool extractable,
-    blink::WebCryptoKeyUsageMask usage_mask,
+    blink::WebCryptoKeyUsageMask usages,
     GenerateKeyResult* result) const {
   return Status::ErrorUnsupported();
 }
 
 Status AlgorithmImplementation::VerifyKeyUsagesBeforeImportKey(
     blink::WebCryptoKeyFormat format,
-    blink::WebCryptoKeyUsageMask usage_mask) const {
+    blink::WebCryptoKeyUsageMask usages) const {
   return Status::ErrorUnsupportedImportKeyFormat();
 }
 
@@ -70,7 +70,7 @@
     const CryptoData& key_data,
     const blink::WebCryptoAlgorithm& algorithm,
     bool extractable,
-    blink::WebCryptoKeyUsageMask usage_mask,
+    blink::WebCryptoKeyUsageMask usages,
     blink::WebCryptoKey* key) const {
   return Status::ErrorUnsupportedImportKeyFormat();
 }
@@ -79,7 +79,7 @@
     const CryptoData& key_data,
     const blink::WebCryptoAlgorithm& algorithm,
     bool extractable,
-    blink::WebCryptoKeyUsageMask usage_mask,
+    blink::WebCryptoKeyUsageMask usages,
     blink::WebCryptoKey* key) const {
   return Status::ErrorUnsupportedImportKeyFormat();
 }
@@ -88,7 +88,7 @@
     const CryptoData& key_data,
     const blink::WebCryptoAlgorithm& algorithm,
     bool extractable,
-    blink::WebCryptoKeyUsageMask usage_mask,
+    blink::WebCryptoKeyUsageMask usages,
     blink::WebCryptoKey* key) const {
   return Status::ErrorUnsupportedImportKeyFormat();
 }
@@ -97,7 +97,7 @@
     const CryptoData& key_data,
     const blink::WebCryptoAlgorithm& algorithm,
     bool extractable,
-    blink::WebCryptoKeyUsageMask usage_mask,
+    blink::WebCryptoKeyUsageMask usages,
     blink::WebCryptoKey* key) const {
   return Status::ErrorUnsupportedImportKeyFormat();
 }