-Wuninitialized fixes

chrome/browser/sync/engine/syncer_thread.cc

 // Copyright (c) 2010 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 "chrome/browser/sync/engine/syncer_thread.h"
 
 #include <algorithm>
 #include <queue>
 #include <string>
 #include <vector>
@@ skipping 842 matching lines @@
   CFTypeRef object = IORegistryEntryCreateCFProperty(hid_service,
                                                      CFSTR("HIDIdleTime"),
                                                      kCFAllocatorDefault,
                                                      0);
   if (!object) {
     LOG(WARNING) << "Could not get IOHIDSystem's HIDIdleTime property";
     IOObjectRelease(hid_service);
     return 0;
   }
 
-  int64 idle_time;  // in nanoseconds
+  int64 idle_time = 0;  // in nanoseconds  // clang pr9061 (?)
   Boolean success = false;
   if (CFGetTypeID(object) == CFNumberGetTypeID()) {
     success = CFNumberGetValue((CFNumberRef)object,
                                kCFNumberSInt64Type,
                                &idle_time);
   } else {
     LOG(WARNING) << "IOHIDSystem's HIDIdleTime property isn't a number!";
   }
 
   CFRelease(object);
@@ skipping 14 matching lines @@
     was_logged = true;
     VLOG(1) << "UserIdleTime unimplemented on this platform, synchronization "
                "will not throttle when user idle";
   }
 #endif
 
   return 0;
 }
 
 }  // namespace browser_sync