crash_keys: Remove old "bad_histogram" key.

Bug: 598854
Change-Id: I380ef1cb8bf2de2a72d52091b619b374b4dc3c33
Reviewed-on: https://chromium-review.googlesource.com/804338
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521231}

base/metrics/histogram.cc

@@ -19,7 +19,6 @@
 
 #include "base/compiler_specific.h"
 #include "base/debug/alias.h"
-#include "base/debug/crash_logging.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
@@ -575,9 +574,6 @@ bool Histogram::ValidateHistogramContents(bool crash_if_invalid,
   // Abort if a problem is found (except "flags", which could legally be zero).
   std::string debug_string = base::StringPrintf(
       "%s/%" PRIu32 "#%d", histogram_name(), bad_fields, identifier);
-#if !defined(OS_NACL)
-  base::debug::ScopedCrashKey crash_key("bad_histogram", debug_string);
-#endif
   CHECK(false) << debug_string;
   debug::Alias(&bad_fields);
   return false;

chrome/app/chrome_crash_reporter_client_win.cc

@@ -154,9 +154,6 @@ size_t RegisterCrashKeysHelper() {
       // TODO(sunnyps): Remove after fixing crbug.com/724999.
       {"gl-context-set-current-stack-trace", kMediumSize},
 
-      // TODO(asvitkine): Remove after fixing https://crbug.com/736675
-      {"bad_histogram", kMediumSize},
-
       // Accessibility keys. Temporary for http://crbug.com/765490.
       {"ax_tree_error", kSmallSize},
       {"ax_tree_update", kMediumSize},

chrome/common/crash_keys.cc

@@ -190,9 +190,6 @@ size_t RegisterChromeCrashKeys() {
     // TODO(sunnyps): Remove after fixing crbug.com/724999.
     {"gl-context-set-current-stack-trace", kMediumSize},
 
-    // TODO(asvitkine): Remove after fixing https://crbug.com/736675
-    {"bad_histogram", kMediumSize},
-
     // Accessibility keys. Temporary for http://crbug.com/765490.
     {"ax_tree_error", kSmallSize},
     {"ax_tree_update", kMediumSize},