Make cc::SoftwareImageDecodeController, cc::ResourcePool, and cc::StagingBufferPoo…

cc/resources/resource_pool.cc

 // Copyright 2012 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/resources/resource_pool.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <utility>
 
 #include "base/format_macros.h"
+#include "base/memory/memory_coordinator_client_registry.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "cc/base/container_util.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/resource_util.h"
 #include "cc/resources/scoped_resource.h"
 
 namespace cc {
 base::TimeDelta ResourcePool::kDefaultExpirationDelay =
@@ skipping 40 matching lines @@
       max_resource_count_(0),
       in_use_memory_usage_bytes_(0),
       total_memory_usage_bytes_(0),
       total_resource_count_(0),
       task_runner_(task_runner),
       evict_expired_resources_pending_(false),
       resource_expiration_delay_(expiration_delay),
       weak_ptr_factory_(this) {
   base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
       this, "cc::ResourcePool", task_runner_.get());
+
+  // Register this component with base::MemoryCoordinatorClientRegistry.
+  base::MemoryCoordinatorClientRegistry::GetInstance()->Register(this);
 }
 
 ResourcePool::~ResourcePool() {
   base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
       this);
+  // Unregister this component with memory_coordinator::ClientRegistry.
+  base::MemoryCoordinatorClientRegistry::GetInstance()->Unregister(this);
 
   DCHECK_EQ(0u, in_use_resources_.size());
 
   while (!busy_resources_.empty()) {
     DidFinishUsingResource(PopBack(&busy_resources_));
   }
 
   SetResourceUsageLimits(0, 0);
   DCHECK_EQ(0u, unused_resources_.size());
   DCHECK_EQ(0u, in_use_memory_usage_bytes_);
@@ skipping 357 matching lines @@
   }
   for (const auto& resource : busy_resources_) {
     resource->OnMemoryDump(pmd, resource_provider_, false /* is_free */);
   }
   for (const auto& entry : in_use_resources_) {
     entry.second->OnMemoryDump(pmd, resource_provider_, false /* is_free */);
   }
   return true;
 }
 
+void ResourcePool::OnMemoryStateChange(base::MemoryState state) {
+  switch (state) {
+    case base::MemoryState::NORMAL:
+      // TODO(tasak): go back to normal state.
+      break;
+    case base::MemoryState::THROTTLED:
+      // TODO(tasak): make the limits of this component's caches smaller to
+      // save memory usage.
+      break;
+    case base::MemoryState::SUSPENDED:
+      // TODO(tasak): free this component's caches as much as possible before
+      // suspending renderer.
+      break;
+    case base::MemoryState::UNKNOWN:
+      // NOT_REACHED.
+      break;
+  }
+}
+
 }  // namespace cc