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

base/trace_event/trace_log.cc

 // Copyright 2015 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.
 
 #include "base/trace_event/trace_log.h"
 
 #include <algorithm>
 #include <cmath>
 #include <utility>
 
@@ skipping 738 matching lines @@
 }
 
 bool TraceLog::HasEnabledStateObserver(EnabledStateObserver* listener) const {
   AutoLock lock(lock_);
   return ContainsValue(enabled_state_observer_list_, listener);
 }
 
 TraceLogStatus TraceLog::GetStatus() const {
   AutoLock lock(lock_);
   TraceLogStatus result;
-  result.event_capacity = logged_events_->Capacity();
-  result.event_count = logged_events_->Size();
+  result.event_capacity = static_cast<uint32_t>(logged_events_->Capacity());
+  result.event_count = static_cast<uint32_t>(logged_events_->Size());
   return result;
 }
 
 bool TraceLog::BufferIsFull() const {
   AutoLock lock(lock_);
   return logged_events_->IsFull();
 }
 
 TraceEvent* TraceLog::AddEventToThreadSharedChunkWhileLocked(
     TraceEventHandle* handle,
@@ skipping 971 matching lines @@
 }
 
 ScopedTraceBinaryEfficient::~ScopedTraceBinaryEfficient() {
   if (*category_group_enabled_) {
     TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(category_group_enabled_, name_,
                                                 event_handle_);
   }
 }
 
 }  // namespace trace_event_internal