Fix warnings on Win64.

src/log-utils.cc

Index: src/log-utils.cc
diff --git a/src/log-utils.cc b/src/log-utils.cc
index f327a0a04a79d1f47a5a4cbb8ce01b115ecc29d1..fd9560418c196bdc31a4f750745e7ea58393205b 100644
--- a/src/log-utils.cc
+++ b/src/log-utils.cc
@@ -155,7 +155,7 @@ void Log::OpenMemoryBuffer() {
   ASSERT(!IsEnabled());
   output_buffer_ = new LogDynamicBuffer(
       kDynamicBufferBlockSize, kMaxDynamicBufferSize,
-      kDynamicBufferSeal, strlen(kDynamicBufferSeal));
+      kDynamicBufferSeal, StrLength(kDynamicBufferSeal));
   Write = WriteToMemory;
   Init();
 }
@@ -195,7 +195,7 @@ int Log::GetLogLines(int from_pos, char* dest_buf, int max_size) {
   // Find previous log line boundary.
   char* end_pos = dest_buf + actual_size - 1;
   while (end_pos >= dest_buf && *end_pos != '\n') --end_pos;
-  actual_size = end_pos - dest_buf + 1;
+  actual_size = static_cast<int>(end_pos - dest_buf + 1);
   ASSERT(actual_size <= max_size);
   return actual_size;
 }
@@ -352,7 +352,7 @@ void LogMessageBuilder::WriteToLogFile() {
 
 
 void LogMessageBuilder::WriteCStringToLogFile(const char* str) {
-  const int len = strlen(str);
+  const int len = StrLength(str);
   const int written = Log::Write(str, len);
   if (written != len && write_failure_handler != NULL) {
     write_failure_handler();
@@ -461,7 +461,7 @@ bool LogRecordCompressor::RetrievePreviousCompressed(
       --data_ptr;
     }
     const intptr_t truncated_len = prev_end - prev_ptr;
-    const int copy_from_pos = data_ptr - data.start();
+    const int copy_from_pos = static_cast<int>(data_ptr - data.start());
     // Check if the length of compressed tail is enough.
     if (truncated_len <= kMaxBackwardReferenceSize
         && truncated_len <= GetBackwardReferenceSize(distance, copy_from_pos)) {
@@ -493,7 +493,7 @@ bool LogRecordCompressor::RetrievePreviousCompressed(
         prev_record->start() + unchanged_len, best.backref_size + 1);
     PrintBackwardReference(backref, best.distance, best.copy_from_pos);
     ASSERT(strlen(backref.start()) - best.backref_size == 0);
-    prev_record->Truncate(unchanged_len + best.backref_size);
+    prev_record->Truncate(static_cast<int>(unchanged_len + best.backref_size));
   }
   return true;
 }