Make base work on iOS

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 <ostream>
 
@@ skipping 56 matching lines @@
 }
 
 StackTrace::StackTrace() {
   StackCrawlState state(reinterpret_cast<uintptr_t*>(trace_), kMaxTraces);
   _Unwind_Backtrace(&TraceStackFrame, &state);
   count_ = state.frame_count;
 }
 
 void StackTrace::Print() const {
   std::string backtrace = ToString();
-  __android_log_write(ANDROID_LOG_ERROR, "chromium", backtrace.c_str());
+  __android_log_write(ANDROID_LOG_ERROR, ANDROID_LOG_TAG, backtrace.c_str());
 }
 
 // NOTE: Native libraries in APKs are stripped before installing. Print out the
 // relocatable address and library names so host computers can use tools to
 // symbolize and demangle (e.g., addr2line, c++filt).
 void StackTrace::OutputToStream(std::ostream* os) const {
   std::string proc_maps;
   std::vector<MappedMemoryRegion> regions;
   // Allow IO to read /proc/self/maps. Reading this file doesn't hit the disk
   // since it lives in procfs, and this is currently used to print a stack trace
   // on fatal log messages in debug builds only. If the restriction is enabled
   // then it will recursively trigger fatal failures when this enters on the
   // UI thread.
   base::ThreadRestrictions::ScopedAllowIO allow_io;
   if (!ReadProcMaps(&proc_maps)) {
     __android_log_write(
-        ANDROID_LOG_ERROR, "chromium", "Failed to read /proc/self/maps");
+        ANDROID_LOG_ERROR, ANDROID_LOG_TAG, "Failed to read /proc/self/maps");
   } else if (!ParseProcMaps(proc_maps, &regions)) {
     __android_log_write(
-        ANDROID_LOG_ERROR, "chromium", "Failed to parse /proc/self/maps");
+        ANDROID_LOG_ERROR, ANDROID_LOG_TAG, "Failed to parse /proc/self/maps");
   }
 
   for (size_t i = 0; i < count_; ++i) {
     // Subtract one as return address of function may be in the next
     // function when a function is annotated as noreturn.
     uintptr_t address = reinterpret_cast<uintptr_t>(trace_[i]) - 1;
 
     std::vector<MappedMemoryRegion>::iterator iter = regions.begin();
     while (iter != regions.end()) {
       if (address >= iter->start && address < iter->end &&
@@ skipping 12 matching lines @@
     } else {
       *os << "<unknown>";
     }
 
     *os << "\n";
   }
 }
 
 }  // namespace debug
 }  // namespace base