Store field trial parameters in shared memory

base/metrics/field_trial.h

Index: base/metrics/field_trial.h
diff --git a/base/metrics/field_trial.h b/base/metrics/field_trial.h
index 509ace4f77df5a6ec62a80d13eb18f19813a482b..14793bf5606f97e411633213234ad0b0b328e8d9 100644
--- a/base/metrics/field_trial.h
+++ b/base/metrics/field_trial.h
@@ -69,6 +69,7 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory.h"
+#include "base/metrics/field_trial_param_associator.h"
 #include "base/metrics/persistent_memory_allocator.h"
 #include "base/observer_list_threadsafe.h"
 #include "base/process/launch.h"
@@ -428,6 +429,9 @@ class BASE_EXPORT FieldTrialList {
   // metrics, crashes, etc.
   static std::string FindFullName(const std::string& trial_name);
 
+  static bool FindParams(const std::string& trial_name,
+                         FieldTrialParamAssociator::FieldTrialParams* params);
+
   // Returns true if the named trial has been registered.
   static bool TrialExists(const std::string& trial_name);
 
@@ -539,6 +543,7 @@ class BASE_EXPORT FieldTrialList {
   // Allow tests to access our innards for testing purposes.
   FRIEND_TEST_ALL_PREFIXES(FieldTrialListTest, InstantiateAllocator);
   FRIEND_TEST_ALL_PREFIXES(FieldTrialListTest, AddTrialsToAllocator);
+  FRIEND_TEST_ALL_PREFIXES(FieldTrialListTest, AssociateFieldTrialParams);
 
   // Expects a mapped piece of shared memory |shm| that was created from the
   // browser process's field_trial_allocator and shared via the command line.