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 405879e9f65abf76460441306366a9df3a84bd41..69d54594e1e60620d8408d1dffc0d24d6eb7de90 100644
--- a/cc/tiles/gpu_image_decode_controller.cc
+++ b/cc/tiles/gpu_image_decode_controller.cc
@@ -7,6 +7,7 @@
 #include <inttypes.h>
 
 #include "base/memory/discardable_memory_allocator.h"
+#include "base/memory/memory_coordinator_client_registry.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/numerics/safe_math.h"
@@ -348,6 +349,8 @@ GpuImageDecodeController::GpuImageDecodeController(ContextProvider* context,
         this, "cc::GpuImageDecodeController",
         base::ThreadTaskRunnerHandle::Get());
   }
+  // Register this component with base::MemoryCoordinatorClientRegistry.
+  base::MemoryCoordinatorClientRegistry::GetInstance()->Register(this);
 }
 
 GpuImageDecodeController::~GpuImageDecodeController() {
@@ -358,6 +361,8 @@ 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.
+  base::MemoryCoordinatorClientRegistry::GetInstance()->Unregister(this);
 }
 
 bool GpuImageDecodeController::GetTaskForImageAndRef(
@@ -1174,4 +1179,23 @@ bool GpuImageDecodeController::DiscardableIsLockedForTesting(
   return image_data->decode.is_locked();
 }
 
+void GpuImageDecodeController::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