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

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index f88e506700efe921e35196f6f9fa07f3faf73080..a46b8ed6e62e1ac13a4ee1036df9138c7772b75e 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -105,6 +105,10 @@
 #include "net/ocsp/nss_ocsp.h"
 #endif
 
+#if defined(OS_ANDROID)
+#include "base/android/build_info.h"
+#endif
+
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/net/cert_verify_proc_chromeos.h"
 #include "chromeos/network/host_resolver_impl_chromeos.h"
@@ -1171,6 +1175,13 @@ void IOThread::SetupDataReductionProxy() {
       IsIncludedInHoldbackFieldTrial()) {
     flags |= data_reduction_proxy::DataReductionProxyParams::kHoldback;
   }
+#if defined(OS_ANDROID)
+  if (data_reduction_proxy::DataReductionProxyParams::
+      IsIncludedInAndroidOnePromoFieldTrial(
+          base::android::BuildInfo::GetInstance()->android_build_fp())) {
+    flags |= data_reduction_proxy::DataReductionProxyParams::kPromoAllowed;

[mmenke, 2014/12/17 16:32:50]

We already have
data_reduction_proxy::DataReductionProxyParams::IsIncludedInPromoFieldTrial().

Calling into DRP code multiple times to check for different field trials seems
weird.  And then we also have another field trial check just above...

Can we just merge these into one method?  Or since DRP already knows about these
field trials anyways, put the checks in DataReductionProxyParams's constructor?

[jeremyim, 2014/12/17 17:52:49]

This will get cleaned up/refactored in bengr's CL
https://codereview.chromium.org/778463002/

+  }
+#endif
   globals_->data_reduction_proxy_params.reset(
       new data_reduction_proxy::DataReductionProxyParams(flags));
   globals_->data_reduction_proxy_auth_request_handler.reset(