Enable all remaining end2end tests on OpenGL ES backend.

This enables all the tests which pass on ES 3.2.

BUG=dawn:580

Change-Id: I56fde768a917d74f24e53cd2f7367aa165c4ac4f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/34720
Commit-Queue: Stephen White <senorblanco@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/tests/end2end/GpuMemorySynchronizationTests.cpp b/src/tests/end2end/GpuMemorySynchronizationTests.cpp
index e0f6631..b208810 100644
--- a/src/tests/end2end/GpuMemorySynchronizationTests.cpp
+++ b/src/tests/end2end/GpuMemorySynchronizationTests.cpp
@@ -235,6 +235,7 @@
                       D3D12Backend(),
                       MetalBackend(),
                       OpenGLBackend(),
+                      OpenGLESBackend(),
                       VulkanBackend());
 
 class StorageToUniformSyncTests : public DawnTest {
@@ -422,6 +423,7 @@
                       D3D12Backend(),
                       MetalBackend(),
                       OpenGLBackend(),
+                      OpenGLESBackend(),
                       VulkanBackend());
 
 constexpr int kRTSize = 8;
@@ -696,4 +698,5 @@
                       D3D12Backend(),
                       MetalBackend(),
                       OpenGLBackend(),
+                      OpenGLESBackend(),
                       VulkanBackend());