[ServiceWorkerCache] Put should replace an existing entry to meet spec.

content/browser/service_worker/service_worker_cache_unittest.cc

Index: content/browser/service_worker/service_worker_cache_unittest.cc
diff --git a/content/browser/service_worker/service_worker_cache_unittest.cc b/content/browser/service_worker/service_worker_cache_unittest.cc
index ceeb431e83c120d5afc3d0efce6fadc42c029b5f..38afc772f6109eea3fb17409e57274b8e4fb02f3 100644
--- a/content/browser/service_worker/service_worker_cache_unittest.cc
+++ b/content/browser/service_worker/service_worker_cache_unittest.cc
@@ -232,6 +232,7 @@ class ServiceWorkerCacheTest : public testing::Test {
     callback_error_ = error;
     callback_response_ = response.Pass();
 
+    callback_response_data_.reset();
     if (error == ServiceWorkerCache::ErrorTypeOK &&
         !callback_response_->blob_uuid.empty()) {
       callback_response_data_ = body_handle.Pass();
@@ -363,6 +364,20 @@ TEST_F(ServiceWorkerCacheTest, PutBodyDropBlobRef) {
   EXPECT_EQ(ServiceWorkerCache::ErrorTypeOK, callback_error_);
 }
 
+TEST_P(ServiceWorkerCacheTestP, PutReplace) {
+  EXPECT_TRUE(Put(body_request_, no_body_response_));
+  EXPECT_TRUE(Match(body_request_));
+  EXPECT_FALSE(callback_response_data_);
+
+  EXPECT_TRUE(Put(body_request_, body_response_));
+  EXPECT_TRUE(Match(body_request_));
+  EXPECT_TRUE(callback_response_data_);
+
+  EXPECT_TRUE(Put(body_request_, no_body_response_));
+  EXPECT_TRUE(Match(body_request_));
+  EXPECT_FALSE(callback_response_data_);
+}
+
 TEST_P(ServiceWorkerCacheTestP, MatchNoBody) {
   EXPECT_TRUE(Put(no_body_request_, no_body_response_));
   EXPECT_TRUE(Match(no_body_request_));