Add builders for tracing event's structural arguments

cc/trees/thread_proxy.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/thread_proxy.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
+#include "base/debug/trace_event_argument.h"
 #include "base/debug/trace_event_synthetic_delay.h"
 #include "cc/base/swap_promise.h"
 #include "cc/debug/benchmark_instrumentation.h"
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/input/input_handler.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/resources/prioritized_resource_manager.h"
 #include "cc/scheduler/delay_based_time_source.h"
@@ skipping 1265 matching lines @@
   return ResourceUpdateController::MaxPartialTextureUpdates();
 }
 
 ThreadProxy::BeginMainFrameAndCommitState::BeginMainFrameAndCommitState()
     : memory_allocation_limit_bytes(0),
       memory_allocation_priority_cutoff(0),
       evicted_ui_resources(false) {}
 
 ThreadProxy::BeginMainFrameAndCommitState::~BeginMainFrameAndCommitState() {}
 
-scoped_ptr<base::Value> ThreadProxy::AsValue() const {
-  scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue());
-
+void ThreadProxy::AsValueInto(base::debug::TracedValue* state) const {
   CompletionEvent completion;
   {
     DebugScopedSetMainThreadBlocked main_thread_blocked(
         const_cast<ThreadProxy*>(this));
+    scoped_refptr<base::debug::TracedValue> state_refptr(state);
     Proxy::ImplThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&ThreadProxy::AsValueOnImplThread,
                    impl_thread_weak_ptr_,
                    &completion,
-                   state.get()));
+                   state_refptr));
     completion.Wait();
   }
-  return state.PassAs<base::Value>();
 }
 
 void ThreadProxy::AsValueOnImplThread(CompletionEvent* completion,
-                                      base::DictionaryValue* state) const {
-  state->Set("layer_tree_host_impl",
-             impl().layer_tree_host_impl->AsValue().release());
+                                      base::debug::TracedValue* state) const {
+  state->BeginDictionary("layer_tree_host_impl");
+  impl().layer_tree_host_impl->AsValueInto(state);
+  state->EndDictionary();
   completion->Signal();
 }
 
 bool ThreadProxy::CommitPendingForTesting() {
   DCHECK(IsMainThread());
   CommitPendingRequest commit_pending_request;
   {
     DebugScopedSetMainThreadBlocked main_thread_blocked(this);
     Proxy::ImplThreadTaskRunner()->PostTask(
         FROM_HERE,
         base::Bind(&ThreadProxy::CommitPendingOnImplThreadForTesting,
                    impl_thread_weak_ptr_,
                    &commit_pending_request));
     commit_pending_request.completion.Wait();
   }
   return commit_pending_request.commit_pending;
 }
 
 void ThreadProxy::CommitPendingOnImplThreadForTesting(
     CommitPendingRequest* request) {
   DCHECK(IsImplThread());
   if (impl().layer_tree_host_impl->output_surface())
     request->commit_pending = impl().scheduler->CommitPending();
   else
     request->commit_pending = false;
   request->completion.Signal();
 }
 
-scoped_ptr<base::Value> ThreadProxy::SchedulerAsValueForTesting() {
-  if (IsImplThread())
-    return impl().scheduler->AsValue().Pass();
-
-  SchedulerStateRequest scheduler_state_request;
-  {
-    DebugScopedSetMainThreadBlocked main_thread_blocked(this);
-    Proxy::ImplThreadTaskRunner()->PostTask(
-        FROM_HERE,
-        base::Bind(&ThreadProxy::SchedulerAsValueOnImplThreadForTesting,
-                   impl_thread_weak_ptr_,
-                   &scheduler_state_request));
-    scheduler_state_request.completion.Wait();
-  }
-  return scheduler_state_request.state.Pass();
-}
-
-void ThreadProxy::SchedulerAsValueOnImplThreadForTesting(
-    SchedulerStateRequest* request) {
-  DCHECK(IsImplThread());
-  request->state = impl().scheduler->AsValue();
-  request->completion.Signal();
-}
-
 void ThreadProxy::RenewTreePriority() {
   DCHECK(IsImplThread());
   bool smoothness_takes_priority =
       impl().layer_tree_host_impl->pinch_gesture_active() ||
       impl().layer_tree_host_impl->page_scale_animation_active() ||
       (impl().layer_tree_host_impl->IsCurrentlyScrolling() &&
        !impl().layer_tree_host_impl->scroll_affects_scroll_handler());
 
   // Schedule expiration if smoothness currently takes priority.
   if (smoothness_takes_priority)
@@ skipping 55 matching lines @@
 
   impl().timing_history.DidActivateSyncTree();
 }
 
 void ThreadProxy::DidManageTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidManageTiles();
 }
 
 }  // namespace cc