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

cc/tiles/gpu_image_decode_controller.cc

Index: cc/tiles/gpu_image_decode_controller.cc
diff --git a/cc/tiles/gpu_image_decode_controller.cc b/cc/tiles/gpu_image_decode_controller.cc
index cd3240b0d876727a7c7629b8014fd95ccd3137b5..6e6f94d3a59c0d076caf1cf1dcb8b788612bada9 100644
--- a/cc/tiles/gpu_image_decode_controller.cc
+++ b/cc/tiles/gpu_image_decode_controller.cc
@@ -18,6 +18,7 @@
 #include "cc/raster/tile_task.h"
 #include "cc/resources/resource_format_utils.h"
 #include "cc/tiles/mipmap_util.h"
+#include "components/memory_coordinator/common/client_registry.h"
 #include "gpu/command_buffer/client/context_support.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu_image_decode_controller.h"
@@ -348,6 +349,11 @@ GpuImageDecodeController::GpuImageDecodeController(ContextProvider* context,
         this, "cc::GpuImageDecodeController",
         base::ThreadTaskRunnerHandle::Get());
   }
+  // Register this component with memory_coordinator::ClientRegistry.
+  memory_coordinator::ClientRegistry* registry =
+      memory_coordinator::ClientRegistry::GetInstance();
+  if (registry)
+    registry->RegisterClient(this);
 }
 
 GpuImageDecodeController::~GpuImageDecodeController() {
@@ -358,6 +364,11 @@ GpuImageDecodeController::~GpuImageDecodeController() {
   // It is safe to unregister, even if we didn't register in the constructor.
   base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
       this);
+  // Unregister this component with memory_coordinator::ClientRegistry.
+  memory_coordinator::ClientRegistry* registry =
+      memory_coordinator::ClientRegistry::GetInstance();
+  if (registry)
+    registry->UnregisterClient(this);
 }
 
 bool GpuImageDecodeController::GetTaskForImageAndRef(
@@ -1125,4 +1136,24 @@ bool GpuImageDecodeController::DiscardableIsLockedForTesting(
   return image_data->decode.is_locked();
 }
 
+void GpuImageDecodeController::OnMemoryStateChange(
+    memory_coordinator::mojom::MemoryState state) {
+  switch (state) {
+    case memory_coordinator::mojom::MemoryState::NORMAL:
+      // TODO(tasak): go back to normal state.
+      break;
+    case memory_coordinator::mojom::MemoryState::THROTTLED:
+      // TODO(tasak): make the limits of this component's caches smaller to
+      // save memory usage.
+      break;
+    case memory_coordinator::mojom::MemoryState::SUSPENDED:
+      // TODO(tasak): free this component's caches as much as possible before
+      // suspending renderer.
+      break;
+    default:
+      // NOT_REACHED.
+      break;
+  }
+}
+
 }  // namespace cc