Keep all references to kInstallDate inside components/metrics/

Follow-up to https://codereview.chromium.org/370813003/ as per request.

BUG=391338
TEST=kInstallDate is still set on startup when it wasn't previously set (and no backup is present in registry)

Review URL: https://codereview.chromium.org/396753005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283467 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chrome_browser_field_trials.cc

@@ -31,21 +31,19 @@ ChromeBrowserFieldTrials::ChromeBrowserFieldTrials(
 ChromeBrowserFieldTrials::~ChromeBrowserFieldTrials() {
 }
 
-void ChromeBrowserFieldTrials::SetupFieldTrials(PrefService* local_state) {
-  const base::Time install_time = base::Time::FromTimeT(
-      local_state->GetInt64(metrics::prefs::kInstallDate));
+void ChromeBrowserFieldTrials::SetupFieldTrials(const base::Time& install_time,
+                                                PrefService* local_state) {
   DCHECK(!install_time.is_null());
 
   // Field trials that are shared by all platforms.
   chrome_variations::SetupUniformityFieldTrials(install_time);
   InstantiateDynamicTrials();
 
 #if defined(OS_ANDROID) || defined(OS_IOS)
-  chrome::SetupMobileFieldTrials(
-      parsed_command_line_, install_time, local_state);
+  chrome::SetupMobileFieldTrials(parsed_command_line_);
 #else
   chrome::SetupDesktopFieldTrials(
-      parsed_command_line_, install_time, local_state);
+      parsed_command_line_, local_state);
 #endif
 }
 

chrome/browser/chrome_browser_field_trials.h

@@ -10,14 +10,19 @@
 
 class PrefService;
 
+namespace base {
+class Time;
+}
+
 class ChromeBrowserFieldTrials {
  public:
   explicit ChromeBrowserFieldTrials(const base::CommandLine& command_line);
   ~ChromeBrowserFieldTrials();
 
   // Called by the browser main sequence to set up Field Trials for this client.
-  // |local_state| is used to extract properties like install time.
-  void SetupFieldTrials(PrefService* local_state);
+  // |local_state| is used to set browser-wide properties.
+  void SetupFieldTrials(const base::Time& install_time,
+                        PrefService* local_state);
 
  private:
   // Instantiates dynamic trials by querying their state, to ensure they get

chrome/browser/chrome_browser_field_trials_desktop.cc

@@ -118,7 +118,6 @@ void SetupPreReadFieldTrial() {
 }  // namespace
 
 void SetupDesktopFieldTrials(const CommandLine& parsed_command_line,
-                             const base::Time& install_time,
                              PrefService* local_state) {
   prerender::ConfigurePrerender(parsed_command_line);
   AutoLaunchChromeFieldTrial();

chrome/browser/chrome_browser_field_trials_desktop.h

@@ -22,7 +22,6 @@ namespace chrome {
 // platforms.
 // |local_state| is needed by some other methods called from within this one.
 void SetupDesktopFieldTrials(const base::CommandLine& parsed_command_line,
-                             const base::Time& install_time,
                              PrefService* local_state);
 
 }  // namespace chrome

chrome/browser/chrome_browser_field_trials_mobile.cc

@@ -72,9 +72,7 @@ void DataCompressionProxyFieldTrials() {
 
 }  // namespace
 
-void SetupMobileFieldTrials(const CommandLine& parsed_command_line,
-                            const base::Time& install_time,
-                            PrefService* local_state) {
+void SetupMobileFieldTrials(const CommandLine& parsed_command_line) {
   DataCompressionProxyFieldTrials();
 #if defined(OS_ANDROID)
   prerender::ConfigurePrerender(parsed_command_line);

chrome/browser/chrome_browser_field_trials_mobile.h

@@ -20,9 +20,7 @@ namespace chrome {
 // Add an invocation of your field trial init function to this method, or to
 // SetupFieldTrials in chrome_browser_field_trials.cc if it is for all
 // platforms.
-void SetupMobileFieldTrials(const base::CommandLine& parsed_command_line,
-                            const base::Time& install_time,
-                            PrefService* local_state);
+void SetupMobileFieldTrials(const base::CommandLine& parsed_command_line);
 
 }  // namespace chrome
 

chrome/browser/chrome_browser_main.cc

@@ -104,7 +104,6 @@
 #include "chrome/installer/util/google_update_settings.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/language_usage_metrics/language_usage_metrics.h"
-#include "components/metrics/metrics_pref_names.h"
 #include "components/metrics/metrics_service.h"
 #include "components/nacl/browser/nacl_browser.h"
 #include "components/nacl/browser/nacl_process_host.h"
@@ -601,8 +600,9 @@ void ChromeBrowserMainParts::SetupMetricsAndFieldTrials() {
   if (variations_service)
     variations_service->CreateTrialsFromSeed();
 
-  // This must be called after the local state is initialized.
-  browser_field_trials_.SetupFieldTrials(local_state_);
+  // This must be called after |local_state_| is initialized.
+  browser_field_trials_.SetupFieldTrials(
+      base::Time::FromTimeT(metrics->GetInstallDate()), local_state_);
 
   // Initialize FieldTrialSynchronizer system. This is a singleton and is used
   // for posting tasks via base::Bind. Its deleted when it goes out of scope.
@@ -937,15 +937,6 @@ int ChromeBrowserMainParts::PreCreateThreadsImpl() {
   // Initialize tracking synchronizer system.
   tracking_synchronizer_ = new chrome_browser_metrics::TrackingSynchronizer();
 
-  // Now that all preferences have been registered, set the install date
-  // for the uninstall metrics if this is our first run. This only actually
-  // gets used if the user has metrics reporting enabled at uninstall time.
-  int64 install_date = local_state_->GetInt64(metrics::prefs::kInstallDate);
-  if (install_date == 0) {
-    local_state_->SetInt64(metrics::prefs::kInstallDate,
-                           base::Time::Now().ToTimeT());
-  }
-
 #if defined(OS_MACOSX)
   // Get the Keychain API to register for distributed notifications on the main
   // thread, which has a proper CFRunloop, instead of later on the I/O thread,

components/metrics/metrics_service.cc

@@ -179,6 +179,7 @@
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
+#include "base/time/time.h"
 #include "base/tracked_objects.h"
 #include "base/values.h"
 #include "components/metrics/metrics_log.h"
@@ -331,6 +332,13 @@ MetricsService::MetricsService(metrics::MetricsStateManager* state_manager,
   DCHECK(state_manager_);
   DCHECK(client_);
   DCHECK(local_state_);
+
+  // Set the install date if this is our first run.
+  int64 install_date = local_state_->GetInt64(metrics::prefs::kInstallDate);
+  if (install_date == 0) {
+    local_state_->SetInt64(metrics::prefs::kInstallDate,
+                           base::Time::Now().ToTimeT());
+  }
 }
 
 MetricsService::~MetricsService() {