dawn_end2end_tests: add WARP suppression for flaky tests

Failed on CI:
https://ci.chromium.org/ui/p/dawn/builders/ci/win-clang-rel-x86/b8718126044695024977/overview
https://ci.chromium.org/ui/p/dawn/builders/ci/win-clang-rel-x64/b8718125841534961617/overview

Bug: 409094881
Change-Id: I463b1668563727df4abd4904122fa8f84ac2af36
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/235617
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: James Price <jrprice@google.com>
Auto-Submit: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: James Price <jrprice@google.com>
diff --git a/src/dawn/tests/end2end/MultithreadTests.cpp b/src/dawn/tests/end2end/MultithreadTests.cpp
index 80df444..bd23df0 100644
--- a/src/dawn/tests/end2end/MultithreadTests.cpp
+++ b/src/dawn/tests/end2end/MultithreadTests.cpp
@@ -1552,6 +1552,8 @@
 // Test resolving timestamp queries on multiple threads. ResolveQuerySet() will create temp
 // resources internally so we need to make sure they are thread safe.
 TEST_P(MultithreadTimestampQueryTests, ResolveQuerySets_InParallel) {
+    DAWN_SUPPRESS_TEST_IF(IsWARP());  // Flaky on WARP
+
     constexpr uint32_t kQueryCount = 2;
     constexpr uint32_t kNumThreads = 10;
 
diff --git a/src/dawn/tests/end2end/QueryTests.cpp b/src/dawn/tests/end2end/QueryTests.cpp
index d96a155..10a689f 100644
--- a/src/dawn/tests/end2end/QueryTests.cpp
+++ b/src/dawn/tests/end2end/QueryTests.cpp
@@ -1073,7 +1073,7 @@
 
 // Test resolving timestamp query to one slot in the buffer
 TEST_P(TimestampQueryTests, ResolveToBufferWithOffset) {
-    DAWN_SUPPRESS_TEST_IF(IsWARP());
+    DAWN_SUPPRESS_TEST_IF(IsWARP());  // Flaky on WARP
 
     constexpr uint32_t kQueryCount = 2;
     constexpr uint64_t kBufferSize = kQueryCount * sizeof(uint64_t) + kMinDestinationOffset;
@@ -1186,6 +1186,8 @@
 
 // Test calling timestamp query from render pass encoder
 TEST_P(TimestampQueryInsidePassesTests, FromOnRenderPass) {
+    DAWN_SUPPRESS_TEST_IF(IsWARP());  // Flaky on WARP
+
     constexpr uint32_t kQueryCount = 2;
 
     // Write timestamp with different query indexes