Set the Flywheel promo rate for Android One devices to be 100%.

components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
index 743c844b0acf7c59a37c6d1bd41f2db2c25028d3..2b1a06d4ed814081141f080e8800fcd97f871dad 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_params.cc
@@ -9,6 +9,7 @@
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
+#include "base/strings/string_piece.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_switches.h"
@@ -41,6 +42,7 @@ const char kDefaultAltFallbackOrigin[] = "http://ssl.googlezip.net:80/";
 const char kDefaultProbeUrl[] = "http://check.googlezip.net/connect";
 const char kDefaultWarmupUrl[] = "http://www.gstatic.com/generate_204";
 
+const char kAndroidOneIdentifier[] = "sprout";
 }  // namespace
 
 namespace data_reduction_proxy {
@@ -87,6 +89,13 @@ bool DataReductionProxyParams::
       "DataReductionProxyRemoveMissingViaHeaderOtherBypass") == kEnabled;
 }
 
+// static
+bool DataReductionProxyParams::IsIncludedInAndroidOnePromoFieldTrial(
+    const char* build_fingerprint) {
+  base::StringPiece fingerprint(build_fingerprint);
+  return (fingerprint.find(kAndroidOneIdentifier) != std::string::npos);
+}
+
 DataReductionProxyTypeInfo::DataReductionProxyTypeInfo()
     : proxy_servers(),
       is_fallback(false),