Adding sampling support to installer crash reporter client.

chrome/installer/setup/installer_crash_reporter_client.cc

Index: chrome/installer/setup/installer_crash_reporter_client.cc
diff --git a/chrome/installer/setup/installer_crash_reporter_client.cc b/chrome/installer/setup/installer_crash_reporter_client.cc
index 3d9cd9a5266834244234bf09094a31316ab64d10..418e901d337154a53fa5bf3a2ff58ee63c96ab5d 100644
--- a/chrome/installer/setup/installer_crash_reporter_client.cc
+++ b/chrome/installer/setup/installer_crash_reporter_client.cc
@@ -14,7 +14,9 @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_version.h"
 #include "chrome/common/env_vars.h"
+#include "chrome/install_static/install_util.h"
 #include "chrome/installer/setup/installer_crash_reporting.h"
+#include "chrome/installer/util/browser_distribution.h"
 #include "chrome/installer/util/google_update_settings.h"
 
 InstallerCrashReporterClient::InstallerCrashReporterClient(
@@ -123,6 +125,20 @@ bool InstallerCrashReporterClient::GetCollectStatsConsent() {
 #endif
 }
 
+bool InstallerCrashReporterClient::GetCollectStatsInSample() {
+  // TODO(grt): remove duplication of code.
+  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
+  base::win::RegKey key(HKEY_CURRENT_USER, dist->GetRegistryPath().c_str(),
+                        KEY_QUERY_VALUE | KEY_WOW64_32KEY);
+  if (!key.Valid())
+    return true;
+  DWORD out_value = 0;
+  if (key.ReadValueDW(install_static::kRegValueChromeStatsSample, &out_value) !=
+      ERROR_SUCCESS)

[grt (UTC plus 2), 2016/10/25 06:58:31]

nit: braces around the body since the conditional spans multiple lines.

[jwd, 2016/10/25 20:36:45]

Done.

+    return true;
+  return out_value == 1;
+}
+
 bool InstallerCrashReporterClient::ReportingIsEnforcedByPolicy(bool* enabled) {
   // From the generated policy/policy/policy_constants.cc:
 #if defined(GOOGLE_CHROME_BUILD)