Drop mobile memory size to 500K while SDCH is not hooked up to

net/sdch/sdch_owner.cc

Index: net/sdch/sdch_owner.cc
diff --git a/net/sdch/sdch_owner.cc b/net/sdch/sdch_owner.cc
index 4e3eef0dd66dbdeee77a32da188727e9f03fce7e..1396c79a7cb463ec717fd2b7715f01bb37c405d4 100644
--- a/net/sdch/sdch_owner.cc
+++ b/net/sdch/sdch_owner.cc
@@ -63,7 +63,7 @@ namespace net {
 // Adjust SDCH limits downwards for mobile.
 #if defined(OS_ANDROID) || defined(OS_IOS)
 // static
-const size_t SdchOwner::kMaxTotalDictionarySize = 1000 * 1000;
+const size_t SdchOwner::kMaxTotalDictionarySize = 500 * 1000;
 #else
 // static
 const size_t SdchOwner::kMaxTotalDictionarySize = 20 * 1000 * 1000;