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

chrome/common/render_messages.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Multiply-included file, no traditional include guard.
 #include <stdint.h>
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
@@ skipping 36 matching lines @@
 namespace IPC {
 
 template <>
 struct ParamTraits<ContentSettingsPattern> {
   typedef ContentSettingsPattern param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, base::PickleIterator* iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
+// Manual traits since this struct uses size_t and it's in Blink, so avoid
+// changing Blink due to IPC differences.
+template <>
+struct ParamTraits<blink::WebCache::UsageStats> {
+  typedef blink::WebCache::UsageStats param_type;
+  static void Write(Message* m, const param_type& u);
+  static bool Read(const Message* m, base::PickleIterator* iter, param_type* u);
+  static void Log(const param_type& p, std::string* l);
+};
+
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_RENDER_MESSAGES_H_
 
 #define IPC_MESSAGE_START ChromeMsgStart
 
 IPC_ENUM_TRAITS_MAX_VALUE(ChromeViewHostMsg_GetPluginInfo_Status,
                           ChromeViewHostMsg_GetPluginInfo_Status::kUnauthorized)
 IPC_ENUM_TRAITS_MAX_VALUE(OmniboxFocusChangeReason,
                           OMNIBOX_FOCUS_CHANGE_REASON_LAST)
@@ skipping 86 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(section_border_color)
   IPC_STRUCT_TRAITS_MEMBER(theme_id)
   IPC_STRUCT_TRAITS_MEMBER(image_horizontal_alignment)
   IPC_STRUCT_TRAITS_MEMBER(image_vertical_alignment)
   IPC_STRUCT_TRAITS_MEMBER(image_tiling)
   IPC_STRUCT_TRAITS_MEMBER(image_height)
   IPC_STRUCT_TRAITS_MEMBER(has_attribution)
   IPC_STRUCT_TRAITS_MEMBER(logo_alternate)
 IPC_STRUCT_TRAITS_END()
 
-IPC_STRUCT_TRAITS_BEGIN(blink::WebCache::UsageStats)
-  IPC_STRUCT_TRAITS_MEMBER(minDeadCapacity)
-  IPC_STRUCT_TRAITS_MEMBER(maxDeadCapacity)
-  IPC_STRUCT_TRAITS_MEMBER(capacity)
-  IPC_STRUCT_TRAITS_MEMBER(liveSize)
-  IPC_STRUCT_TRAITS_MEMBER(deadSize)
-IPC_STRUCT_TRAITS_END()
-
 IPC_ENUM_TRAITS_MAX_VALUE(NTPLoggingEventType,
                           NTP_EVENT_TYPE_LAST)
 
 IPC_ENUM_TRAITS_MAX_VALUE(WebApplicationInfo::MobileCapable,
                           WebApplicationInfo::MOBILE_CAPABLE_APPLE)
 
 IPC_STRUCT_TRAITS_BEGIN(WebApplicationInfo::IconInfo)
   IPC_STRUCT_TRAITS_MEMBER(url)
   IPC_STRUCT_TRAITS_MEMBER(width)
   IPC_STRUCT_TRAITS_MEMBER(height)
@@ skipping 402 matching lines @@
 
 // Record a sample string to a Rappor metric.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_RecordRappor,
                      std::string /* metric */,
                      std::string /* sample */)
 
 // Record a domain and registry of a url to a Rappor metric.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_RecordRapporURL,
                      std::string /* metric */,
                      GURL /* sample url */)