[Telemetry] Suppress red-herring error messages.

tools/telemetry/telemetry/core/memory_cache_http_server.py

Index: tools/telemetry/telemetry/core/memory_cache_http_server.py
diff --git a/tools/telemetry/telemetry/core/memory_cache_http_server.py b/tools/telemetry/telemetry/core/memory_cache_http_server.py
index 130ec811af16acb04ae99a20510ef9df5401a3a7..eaa812dc4f8ad311aeeac121c3f56f4b43aa01db 100644
--- a/tools/telemetry/telemetry/core/memory_cache_http_server.py
+++ b/tools/telemetry/telemetry/core/memory_cache_http_server.py
@@ -3,10 +3,12 @@
 # found in the LICENSE file.
 
 import BaseHTTPServer
+import errno
 import gzip
 import mimetypes
 import os
 import SimpleHTTPServer
+import socket
 import SocketServer
 import StringIO
 import sys
@@ -24,6 +26,16 @@ class MemoryCacheHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
   protocol_version = 'HTTP/1.1'  # override BaseHTTPServer setting
   wbufsize = -1  # override StreamRequestHandler (a base class) setting
 
+  def handle(self):
+    try:
+      BaseHTTPServer.BaseHTTPRequestHandler.handle(self)
+    except socket.error, e:
+      # Connection reset errors happen all the time due to the browser closing
+      # without terminating the connection properly.  They can be safely
+      # ignored.
+      if e[0] != errno.ECONNRESET:
+        raise
+
   def do_GET(self):
     """Serve a GET request."""
     resource_range = self.SendHead()