diff --git a/third_party/blink/renderer/platform/loader/fetch/resource_fetcher.cc b/third_party/blink/renderer/platform/loader/fetch/resource_fetcher.cc
index 123c6ef7166b79..24472755f6c623 100644
--- a/third_party/blink/renderer/platform/loader/fetch/resource_fetcher.cc
+++ b/third_party/blink/renderer/platform/loader/fetch/resource_fetcher.cc
@@ -928,11 +928,6 @@ void ResourceFetcher::UpdateMemoryCacheStats(
     RecordResourceHistogram("Preload.", factory.GetType(), policy);
   } else {
     RecordResourceHistogram("", factory.GetType(), policy);
-
-    // Log metrics to evaluate effectiveness of the memory cache if it was
-    // partitioned by the top-frame site.
-    if (same_top_frame_site_resource_cached)
-      RecordResourceHistogram("PerTopFrameSite.", factory.GetType(), policy);
   }
 
   // Aims to count Resource only referenced from MemoryCache (i.e. what would be
diff --git a/third_party/blink/renderer/platform/loader/fetch/resource_fetcher_test.cc b/third_party/blink/renderer/platform/loader/fetch/resource_fetcher_test.cc
index 29183ff9c72e44..d5993c04a569dd 100644
--- a/third_party/blink/renderer/platform/loader/fetch/resource_fetcher_test.cc
+++ b/third_party/blink/renderer/platform/loader/fetch/resource_fetcher_test.cc
@@ -386,9 +386,6 @@ TEST_F(ResourceFetcherTest, MetricsPerTopFrameSite) {
   EXPECT_EQ(resource_1, resource_2);
 
   // Test histograms.
-  histogram_tester.ExpectTotalCount(
-      "Blink.MemoryCache.RevalidationPolicy.PerTopFrameSite.Mock", 0);
-
   histogram_tester.ExpectTotalCount("Blink.MemoryCache.RevalidationPolicy.Mock",
                                     2);
 
@@ -400,7 +397,7 @@ TEST_F(ResourceFetcherTest, MetricsPerTopFrameSite) {
       0 /* RevalidationPolicy::kUse */, 1);
 
   // Now load the same resource with origin_b as top-frame site. The
-  // PerTopFrameSite histogram should be incremented.
+  // histograms should be incremented.
   auto* fetcher_3 = CreateFetcher();
   ResourceRequestHead request_head_3(url);
   scoped_refptr<const SecurityOrigin> foo_origin_b =
@@ -412,11 +409,6 @@ TEST_F(ResourceFetcherTest, MetricsPerTopFrameSite) {
   Resource* resource_3 =
       MockResource::Fetch(fetch_params_2, fetcher_3, nullptr);
   EXPECT_EQ(resource_1, resource_3);
-  histogram_tester.ExpectTotalCount(
-      "Blink.MemoryCache.RevalidationPolicy.PerTopFrameSite.Mock", 1);
-  histogram_tester.ExpectBucketCount(
-      "Blink.MemoryCache.RevalidationPolicy.PerTopFrameSite.Mock",
-      0 /* RevalidationPolicy::kUse */, 1);
   histogram_tester.ExpectTotalCount("Blink.MemoryCache.RevalidationPolicy.Mock",
                                     3);
   histogram_tester.ExpectBucketCount(
@@ -465,9 +457,6 @@ TEST_F(ResourceFetcherTest, MetricsPerTopFrameSiteOpaqueOrigins) {
   EXPECT_EQ(resource_1, resource_2);
 
   // Test histograms.
-  histogram_tester.ExpectTotalCount(
-      "Blink.MemoryCache.RevalidationPolicy.PerTopFrameSite.Mock", 0);
-
   histogram_tester.ExpectTotalCount("Blink.MemoryCache.RevalidationPolicy.Mock",
                                     2);
 
@@ -479,7 +468,7 @@ TEST_F(ResourceFetcherTest, MetricsPerTopFrameSiteOpaqueOrigins) {
       0 /* RevalidationPolicy::kUse */, 1);
 
   // Now load the same resource with opaque_origin1 as top-frame site. The
-  // PerTopFrameSite histogram should be incremented.
+  // histograms should be incremented.
   auto* fetcher_3 = CreateFetcher();
   ResourceRequestHead request_head_3(url);
   request_head_3.SetTopFrameOrigin(opaque_origin2);
@@ -489,11 +478,6 @@ TEST_F(ResourceFetcherTest, MetricsPerTopFrameSiteOpaqueOrigins) {
   Resource* resource_3 =
       MockResource::Fetch(fetch_params_2, fetcher_3, nullptr);
   EXPECT_EQ(resource_1, resource_3);
-  histogram_tester.ExpectTotalCount(
-      "Blink.MemoryCache.RevalidationPolicy.PerTopFrameSite.Mock", 1);
-  histogram_tester.ExpectBucketCount(
-      "Blink.MemoryCache.RevalidationPolicy.PerTopFrameSite.Mock",
-      0 /* RevalidationPolicy::kUse */, 1);
   histogram_tester.ExpectTotalCount("Blink.MemoryCache.RevalidationPolicy.Mock",
                                     3);
   histogram_tester.ExpectBucketCount(
diff --git a/tools/metrics/histograms/metadata/blink/histograms.xml b/tools/metrics/histograms/metadata/blink/histograms.xml
index cf3e8aa8da09d3..22fe1e708ac12c 100644
--- a/tools/metrics/histograms/metadata/blink/histograms.xml
+++ b/tools/metrics/histograms/metadata/blink/histograms.xml
@@ -2457,19 +2457,6 @@ chromium-metrics-reviews@google.com.
   <token key="ResourceType" variants="ResourceType"/>
 </histogram>
 
-<histogram
-    name="Blink.MemoryCache.RevalidationPolicy.PerTopFrameSite.{ResourceType}"
-    enum="RevalidationPolicy" expires_after="2021-12-26">
-  <owner>shivanisha@chromium.org</owner>
-  <owner>privacy-sandbox-dev@chromium.org</owner>
-  <summary>
-    RevalidationPolicy used for requests for each resource type. Logged only if
-    the resource is found in the memory cache and if the same top-frame site had
-    loaded this resource earlier.
-  </summary>
-  <token key="ResourceType" variants="ResourceType"/>
-</histogram>
-
 <histogram name="Blink.MemoryCache.RevalidationPolicy.Preload.{ResourceType}"
     enum="RevalidationPolicy" expires_after="2023-10-01">
   <owner>hiroshige@chromium.org</owner>