Coverity: Fix a few uninitialized vars.

content/browser/renderer_host/render_sandbox_host_linux.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 "content/browser/renderer_host/render_sandbox_host_linux.h"
 
 #include <fcntl.h>
 #include <fontconfig/fontconfig.h>
 #include <stdint.h>
 #include <unistd.h>
@@ skipping 140 matching lines @@
   error:
     for (std::vector<int>::const_iterator
          i = fds.begin(); i != fds.end(); ++i) {
       close(*i);
     }
   }
 
   void HandleFontMatchRequest(int fd, const Pickle& pickle, PickleIterator iter,
                               std::vector<int>& fds) {
     bool filefaceid_valid;
-    uint32_t filefaceid;
+    uint32_t filefaceid = 0;
 
     if (!pickle.ReadBool(&iter, &filefaceid_valid))
       return;
     if (filefaceid_valid) {
       if (!pickle.ReadUInt32(&iter, &filefaceid))
         return;
     }
     bool is_bold, is_italic;
     if (!pickle.ReadBool(&iter, &is_bold) ||
         !pickle.ReadBool(&iter, &is_italic)) {
@@ skipping 550 matching lines @@
 }
 
 RenderSandboxHostLinux::~RenderSandboxHostLinux() {
   if (initialized_) {
     if (HANDLE_EINTR(close(renderer_socket_)) < 0)
       PLOG(ERROR) << "close";
     if (HANDLE_EINTR(close(childs_lifeline_fd_)) < 0)
       PLOG(ERROR) << "close";
   }
 }