Adding support for sampling crashes in Chrome on Windows.

chrome/install_static/install_util.h

Index: chrome/install_static/install_util.h
diff --git a/chrome/install_static/install_util.h b/chrome/install_static/install_util.h
index be2a99d4751a49c8509b9b5559afe9b048bcb455..b2ffcbebccd3e71061fab03ce0ac9eba5537d802 100644
--- a/chrome/install_static/install_util.h
+++ b/chrome/install_static/install_util.h
@@ -41,6 +41,9 @@ extern const wchar_t kAppGuidCanary[];
 extern const wchar_t kAppGuidGoogleChrome[];
 extern const wchar_t kAppGuidGoogleBinaries[];
 
+extern const wchar_t kChromeMetrics[];
+extern const wchar_t kChromeStatsSampleKey[];
+
 // TODO(ananta)
 // https://crbug.com/604923
 // Unify these constants with env_vars.h.
@@ -78,6 +81,10 @@ bool GetCollectStatsConsent();
 // Only used by tests.
 bool GetCollectStatsConsentForTesting(const std::wstring& exe_path);
 
+// Returns true if the current executable is curretnly in the chosen sample that

[scottmg, 2016/08/11 21:38:03]

currently

[jwd, 2016/08/11 22:02:53]

Done.

+// will report stats and crashes.
+bool GetCollectStatsInSample();
+
 // Returns true if if usage stats reporting is controlled by a mandatory
 // policy. |metrics_is_enforced_by_policy| will be set to true accordingly.
 // TODO(ananta)