Add compile time checks against longs being used in IPC structs on 32 bit Android.

components/web_cache/common/web_cache_messages.h

Index: components/web_cache/common/web_cache_messages.h
diff --git a/components/web_cache/common/web_cache_messages.h b/components/web_cache/common/web_cache_messages.h
index 5ff9f2545ea08c7a2864b9d0aa966f28bed07d89..58f9c70b825237e9093ff7e5873481702ac0f04f 100644
--- a/components/web_cache/common/web_cache_messages.h
+++ b/components/web_cache/common/web_cache_messages.h
@@ -17,9 +17,9 @@
 
 // Tells the renderer to set its maximum cache size to the supplied value.
 IPC_MESSAGE_CONTROL3(WebCacheMsg_SetCacheCapacities,
-                     size_t /* min_dead_capacity */,
-                     size_t /* max_dead_capacity */,
-                     size_t /* capacity */)
+                     uint32_t /* min_dead_capacity */,
+                     uint32_t /* max_dead_capacity */,
+                     uint32_t /* capacity */)
 
 // Tells the renderer to clear the cache.
 IPC_MESSAGE_CONTROL1(WebCacheMsg_ClearCache,