linux: zygote should suicide when the browser channel closes.

We attempt to do this when recvmsg() returns 0, indicating EOF.
But man 7 unix also says we can get ECONNRESET, so accept that too.

TEST=run Chrome such that it exits quickly, e.g.
  ./out/Debug/chrome --try-chrome-again=10001
it should not print any zygote error messages.

Review URL: http://codereview.chromium.org/3387017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60486 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 5 deletions

diff --git a/chrome/browser/zygote_main_linux.cc b/chrome/browser/zygote_main_linux.cc
index fada72f..64ec0f7 100644
--- a/chrome/browser/zygote_main_linux.cc
+++ b/chrome/browser/zygote_main_linux.cc
@@ -141,17 +141,18 @@ class Zygote {
     static const unsigned kMaxMessageLength = 1024;
     char buf[kMaxMessageLength];
     const ssize_t len = base::RecvMsg(fd, buf, sizeof(buf), &fds);
-    if (len == -1) {
-      LOG(WARNING) << "Error reading message from browser: " << errno;
-      return false;
-    }
 
-    if (len == 0) {
+    if (len == 0 || (len == -1 && errno == ECONNRESET)) {
       // EOF from the browser. We should die.
       _exit(0);
       return false;
     }
 
+    if (len == -1) {
+      PLOG(ERROR) << "Error reading message from browser";
+      return false;
+    }
+
     Pickle pickle(buf, len);
     void* iter = NULL;