Update to Chromium //base at Chromium commit e3a753f17bac62738b0dbf0b36510f767b081e4b.

logging.cc

Index: logging.cc
diff --git a/logging.cc b/logging.cc
index 97ee1346ca8f1ad711fbe32d36a99b11c2b3a922..c6992b981aef8ace54b27b656eeebbaaff46c9bf 100644
--- a/logging.cc
+++ b/logging.cc
@@ -545,8 +545,8 @@ LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
 LogMessage::~LogMessage() {
 #if !defined(OFFICIAL_BUILD) && !defined(OS_NACL) && !defined(__UCLIBC__) && \
     !defined(FNL_MUSL)
-  if (severity_ == LOG_FATAL) {
-    // Include a stack trace on a fatal.
+  if (severity_ == LOG_FATAL && !base::debug::BeingDebugged()) {
+    // Include a stack trace on a fatal, unless a debugger is attached.
     base::debug::StackTrace trace;
     stream_ << std::endl;  // Newline to separate from log message.
     trace.OutputToStream(&stream_);
@@ -640,7 +640,11 @@ LogMessage::~LogMessage() {
       // information, and displaying message boxes when the application is
       // hosed can cause additional problems.
 #ifndef NDEBUG
-      DisplayDebugMessageInDialog(stream_.str());
+      if (!base::debug::BeingDebugged()) {
+        // Displaying a dialog is unnecessary when debugging and can complicate
+        // debugging.
+        DisplayDebugMessageInDialog(stream_.str());
+      }
 #endif
       // Crash the process to generate a dump.
       base::debug::BreakDebugger();