Added variable initialization (valgrind complains).

chrome/browser/thumbnails/content_analysis_unittest.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 "chrome/browser/thumbnails/content_analysis.h"
 
 #include <algorithm>
 #include <cmath>
 #include <cstdlib>
 #include <limits>
@@ skipping 452 matching lines @@
       source, gfx::Size(424, 264), 2.5);
   EXPECT_FALSE(result.empty());
 
   // Given the nature of computation We can't really assert much here about the
   // image itself. We know it should have been computed, should be smaller than
   // the original and it must not be zero.
   EXPECT_LT(result.width(), image_size.width());
   EXPECT_LT(result.height(), image_size.height());
   // TODO(motek): this test is problematic/flaky on Win7. Investigate.
 #if !defined(OS_WIN)
-  int histogram[256];
+  int histogram[256] = {};
   color_utils::BuildLumaHistogram(result, histogram);
   int non_zero_color_count = std::count_if(
       histogram, histogram + 256, std::bind2nd(std::greater<int>(), 0));
   EXPECT_GT(non_zero_color_count, 4);
 #endif  // !defined(OS_WIN)
 }
 
 }  // namespace thumbnailing_utils