Removing iPad Tab Switcher experimental flag.

ios/chrome/browser/snapshots/snapshot_cache.mm

Index: ios/chrome/browser/snapshots/snapshot_cache.mm
diff --git a/ios/chrome/browser/snapshots/snapshot_cache.mm b/ios/chrome/browser/snapshots/snapshot_cache.mm
index d648eba7c3002203e32e2bbe291057bdde45e343..ff319927d62b734ec2f7de700c50564773f423d8 100644
--- a/ios/chrome/browser/snapshots/snapshot_cache.mm
+++ b/ios/chrome/browser/snapshots/snapshot_cache.mm
@@ -405,13 +405,12 @@ void ConvertAndSaveGreyImage(
 
 - (BOOL)inMemoryCacheIsEnabled {
   // In-memory cache on iPad is enabled only when the tab switcher is enabled.
-  return !IsIPadIdiom() || experimental_flags::IsTabSwitcherEnabled();
+  return !IsIPadIdiom();

[rohitrao (ping after 24h), 2017/02/01 18:34:34]

It looks like the old implementation always returned true, so this is a change
in behavior?

[jif, 2017/02/03 12:55:50]

It is! Thank you.
Done.

 }
 
 - (BOOL)usesLRUCache {
   // Always use the LRUCache when the tab switcher is enabled.
-  return experimental_flags::IsTabSwitcherEnabled() ||
-         experimental_flags::IsLRUSnapshotCacheEnabled();
+  return experimental_flags::IsLRUSnapshotCacheEnabled();

[rohitrao (ping after 24h), 2017/02/01 18:34:34]

Same here.

[jif, 2017/02/03 12:55:51]

Done.

 }
 
 - (void)handleLowMemory {