Remove some histograms that have not provided benefit.

I added these to try to look at exit codes in crashes, but we didn't find
antyhing surprising.  I'm now removing them.

r=nsylvain
Review URL: http://codereview.chromium.org/343053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30663 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 28 deletions

diff --git a/base/process_util_win.cc b/base/process_util_win.cc
index ea1df60..f6157db 100644
--- a/base/process_util_win.cc
+++ b/base/process_util_win.cc
@@ -363,34 +363,6 @@ bool DidProcessCrash(bool* child_exited, ProcessHandle handle) {
   }
 
   // All other exit codes indicate crashes.
-
-  // TODO(jar): Remove histogramming code when UMA stats are consistent with
-  // other crash metrics.
-  // Histogram the low order 3 nibbles for UMA
-  const int kLeastValue = 0;
-  const int kMaxValue = 0xFFF;
-  const int kBucketCount = kMaxValue - kLeastValue + 1;
-  static LinearHistogram least_significant_histogram("ExitCodes.LSNibbles",
-      kLeastValue + 1, kMaxValue, kBucketCount);
-  least_significant_histogram.SetFlags(kUmaTargetedHistogramFlag |
-                                       LinearHistogram::kHexRangePrintingFlag);
-  least_significant_histogram.Add(exitcode & 0xFFF);
-
-  // Histogram the high order 3 nibbles
-  static LinearHistogram most_significant_histogram("ExitCodes.MSNibbles",
-      kLeastValue + 1, kMaxValue, kBucketCount);
-  most_significant_histogram.SetFlags(kUmaTargetedHistogramFlag |
-                                      LinearHistogram::kHexRangePrintingFlag);
-  // Avoid passing in negative numbers by shifting data into low end of dword.
-  most_significant_histogram.Add((exitcode >> 20) & 0xFFF);
-
-  // Histogram the middle order 2 nibbles
-  static LinearHistogram mid_significant_histogram("ExitCodes.MidNibbles",
-      1, 0xFF, 0x100);
-  mid_significant_histogram.SetFlags(kUmaTargetedHistogramFlag |
-                                      LinearHistogram::kHexRangePrintingFlag);
-  mid_significant_histogram.Add((exitcode >> 12) & 0xFF);
-
   return true;
 }