Fix Integer-overflow in base::Time::FromExploded.

media/ffmpeg/ffmpeg_common.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 "media/ffmpeg/ffmpeg_common.h"
 
 #include "base/logging.h"
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
@@ skipping 735 matching lines @@
 
   // TODO(acolwell): Update this parsing code when FFmpeg returns sub-second
   // information.
   std::vector<base::StringPiece> time_fields = base::SplitStringPiece(
       fields[1], ":", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
   if (time_fields.size() != 3)
     return false;
 
   base::Time::Exploded exploded;
   exploded.millisecond = 0;
+  // This field cannot be uninitialized. Unless not modified, make it 0 here
+  // then.
+  exploded.day_of_week = 0;
   if (base::StringToInt(date_fields[0], &exploded.year) &&
       base::StringToInt(date_fields[1], &exploded.month) &&
       base::StringToInt(date_fields[2], &exploded.day_of_month) &&
       base::StringToInt(time_fields[0], &exploded.hour) &&
       base::StringToInt(time_fields[1], &exploded.minute) &&
       base::StringToInt(time_fields[2], &exploded.second)) {
     if (base::Time::FromUTCExploded(exploded, out))
       return true;
   }
 
@@ skipping 59 matching lines @@
 TEST_COLORSPACE(RESERVED);
 TEST_COLORSPACE(FCC);
 TEST_COLORSPACE(BT470BG);
 TEST_COLORSPACE(SMPTE170M);
 TEST_COLORSPACE(SMPTE240M);
 TEST_COLORSPACE(YCOCG);
 TEST_COLORSPACE(BT2020_NCL);
 TEST_COLORSPACE(BT2020_CL);
 
 }  // namespace media