Move FieldTrialRecorder mojom to content

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index e99e3b54b3edc684a57ae75264ffb588e9b4192c..468b7f6bc88d1d85aa2315bf6c930f55a56e2b2c 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -71,6 +71,7 @@
 #include "content/common/content_constants_internal.h"
 #include "content/common/dom_storage/dom_storage_messages.h"
 #include "content/common/features.h"
+#include "content/common/field_trial_recorder.mojom.h"
 #include "content/common/frame_messages.h"
 #include "content/common/frame_owner_properties.h"
 #include "content/common/render_process_messages.h"
@@ -579,7 +580,8 @@ RenderThreadImpl::RenderThreadImpl(
       renderer_scheduler_(std::move(scheduler)),
       categorized_worker_pool_(new CategorizedWorkerPool()),
       renderer_binding_(this),
-      client_id_(1) {
+      client_id_(1),
+      field_trial_syncer_(this) {
   Init(resource_task_queue);
 }
 
@@ -597,7 +599,8 @@ RenderThreadImpl::RenderThreadImpl(
       categorized_worker_pool_(new CategorizedWorkerPool()),
       is_scroll_animator_enabled_(false),
       is_surface_synchronization_enabled_(false),
-      renderer_binding_(this) {
+      renderer_binding_(this),
+      field_trial_syncer_(this) {
   scoped_refptr<base::SingleThreadTaskRunner> test_task_counter;
   DCHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kRendererClientId));
@@ -717,6 +720,9 @@ void RenderThreadImpl::Init(
 
   GetContentClient()->renderer()->RenderThreadStarted();
 
+  field_trial_syncer_.InitFieldTrialObserving(
+      *base::CommandLine::ForCurrentProcess(), switches::kSingleProcess);
+
   GetAssociatedInterfaceRegistry()->AddInterface(
       base::Bind(&RenderThreadImpl::OnRendererInterfaceRequest,
                  base::Unretained(this)));
@@ -1485,6 +1491,11 @@ RenderThreadImpl::GetLoadingTaskRunner() {
   return renderer_scheduler_->LoadingTaskRunner();
 }
 
+void RenderThreadImpl::SetFieldTrialGroup(const std::string& trial_name,
+                                          const std::string& group_name) {
+  field_trial_syncer_.OnSetFieldTrialGroup(trial_name, group_name);
+}
+
 void RenderThreadImpl::OnAssociatedInterfaceRequest(
     const std::string& name,
     mojo::ScopedInterfaceEndpointHandle handle) {
@@ -2047,6 +2058,14 @@ gpu::GpuChannelHost* RenderThreadImpl::GetGpuChannel() {
   return gpu_channel_.get();
 }
 
+void RenderThreadImpl::OnFieldTrialGroupFinalized(
+    const std::string& trial_name,
+    const std::string& group_name) {
+  mojom::FieldTrialRecorderPtr field_trial_recorder;
+  GetRemoteInterfaces()->GetInterface(&field_trial_recorder);
+  field_trial_recorder->FieldTrialActivated(trial_name);
+}
+
 void RenderThreadImpl::CreateView(mojom::CreateViewParamsPtr params) {
   CompositorDependencies* compositor_deps = this;
   is_scroll_animator_enabled_ = params->web_preferences.enable_scroll_animator;