Eliminate build warnings in base/ for Android x64

base/debug/stack_trace_android.cc

 // 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.
 
 #include "base/debug/stack_trace.h"
 
 #include <android/log.h>
 #include <unwind.h>
 
 #include "base/debug/proc_maps_linux.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_restrictions.h"
 
+#ifdef __LP64__
+#define FMT_ADDR  "0x%016lx"
+#else
+#define FMT_ADDR  "0x%08x"
+#endif
+
 namespace {
 
 struct StackCrawlState {
   StackCrawlState(uintptr_t* frames, size_t max_depth)
       : frames(frames),
         frame_count(0),
         max_depth(max_depth),
         have_skipped_self(false) {}
 
   uintptr_t* frames;
@@ skipping 73 matching lines @@
 
     std::vector<MappedMemoryRegion>::iterator iter = regions.begin();
     while (iter != regions.end()) {
       if (address >= iter->start && address < iter->end &&
           !iter->path.empty()) {
         break;
       }
       ++iter;
     }
 
-    *os << base::StringPrintf("#%02d 0x%08x ", i, address);
+    *os << base::StringPrintf("#%02zd " FMT_ADDR " ", i, address);
 
     if (iter != regions.end()) {
       uintptr_t rel_pc = address - iter->start + iter->offset;
       const char* path = iter->path.c_str();
-      *os << base::StringPrintf("%s+0x%08x", path, rel_pc);
+      *os << base::StringPrintf("%s+" FMT_ADDR, path, rel_pc);
     } else {
       *os << "<unknown>";
     }
 
     *os << "\n";
   }
 }
 
 }  // namespace debug
 }  // namespace base