Removed use of IsRunningOnIOS8OrLater from snapshots code.

ios/chrome/browser/snapshots/snapshot_cache_unittest.mm

Index: ios/chrome/browser/snapshots/snapshot_cache_unittest.mm
diff --git a/ios/chrome/browser/snapshots/snapshot_cache_unittest.mm b/ios/chrome/browser/snapshots/snapshot_cache_unittest.mm
index ef3145d505995afe4aa74d6ca81610742849d458..4243130e7a701767a95048ca2a4e3e5f23197054 100644
--- a/ios/chrome/browser/snapshots/snapshot_cache_unittest.mm
+++ b/ios/chrome/browser/snapshots/snapshot_cache_unittest.mm
@@ -349,10 +349,11 @@ TEST_F(SnapshotCacheTest, Purge) {
 // Loads the color images into the cache, and pins two of them.  Ensures that
 // only the two pinned IDs remain in memory after a call to -handleLowMemory.
 TEST_F(SnapshotCacheTest, HandleLowMemory) {
-// TODO(droger): This test fails on iPad iOS8 device: http://crbug.com/455209
+// TODO(crbug.com/455209): This test failed on iPad iOS8 device, but may no
+// longer be failing on iOS 9 and up. Should test by re-enabling and monitor.
 #if !TARGET_IPHONE_SIMULATOR
-  if (IsIPadIdiom() && base::ios::IsRunningOnIOS8OrLater()) {
-    LOG(WARNING) << "Test disabled on iPad iOS8 device.";
+  if (IsIPadIdiom()) {
+    LOG(WARNING) << "Test disabled on iPad device.";
     return;
   }
 #endif