Android: Drop version extension for UMA.

chrome/browser/chrome_browser_main.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/chrome_browser_main.h"
 
 #if defined(TOOLKIT_GTK)
 #include <gtk/gtk.h>
 #endif
 
@@ skipping 123 matching lines @@
 #include "net/base/net_module.h"
 #include "net/base/sdch_manager.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/http/http_network_layer.h"
 #include "net/http/http_stream_factory.h"
 #include "net/url_request/url_request.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 
-#if defined(OS_ANDROID)
-#include "base/android/build_info.h"
-#endif
-
 #if !defined(OS_ANDROID)
 #include "chrome/browser/ui/active_tab_tracker.h"
 #endif
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
 #include "chrome/browser/first_run/upgrade_util_linux.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/cros/cros_library.h"
@@ skipping 421 matching lines @@
 // This will be called after the command-line has been mutated by about:flags
 void ChromeBrowserMainParts::SetupMetricsAndFieldTrials() {
   // Must initialize metrics after labs have been converted into switches,
   // but before field trials are set up (so that client ID is available for
   // one-time randomized field trials).
 #if defined(OS_WIN)
   if (parsed_command_line_.HasSwitch(switches::kChromeFrame))
     MetricsLog::set_version_extension("-F");
 #elif defined(ARCH_CPU_64_BITS)
   MetricsLog::set_version_extension("-64");
-#elif defined(OS_ANDROID)
-  // Set version extension to identify Android releases.
-  // Example: 16.0.912.61-K88
-  std::string version_extension = "-K";
-  version_extension.append(
-      base::android::BuildInfo::GetInstance()->package_version_code());
-  MetricsLog::set_version_extension(version_extension);
 #endif  // defined(OS_WIN)
 
   // Initialize FieldTrialList to support FieldTrials that use one-time
   // randomization.
   MetricsService* metrics = browser_process_->metrics_service();
   bool metrics_reporting_enabled = IsMetricsReportingEnabled();
   if (metrics_reporting_enabled)
     metrics->ForceClientIdCreation();  // Needed below.
   field_trial_list_.reset(
       new base::FieldTrialList(
@@ skipping 1140 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }