memory coordinator: Add MemoryCoordinatorClient::OnPurgeMemory()

content/renderer/render_thread_impl.cc

 // Copyright (c) 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 "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 1650 matching lines @@
   if (!RendererIsHidden())
     return;
 
   // TODO(bashi): Enable the tab suspension when MemoryCoordinator is enabled.
   if (base::FeatureList::IsEnabled(features::kMemoryCoordinator))
     return;
 
   if (base::FeatureList::IsEnabled(features::kPurgeAndSuspend)) {
     // TODO(tasak): After enabling MemoryCoordinator, remove this Notify
     // and follow MemoryCoordinator's request.
-    base::MemoryCoordinatorClientRegistry::GetInstance()->Notify(
-        base::MemoryState::SUSPENDED);
+    base::MemoryCoordinatorClientRegistry::GetInstance()->PurgeMemory();
   }
   // Since purging is not a synchronous task (e.g. v8 GC, oilpan GC, ...),
   // we need to wait until the task is finished. So wait 15 seconds and
   // update purge+suspend UMA histogram.
   // TODO(tasak): use MemoryCoordinator's callback to report purge+suspend
   // UMA when MemoryCoordinator is available.
   GetRendererScheduler()->DefaultTaskRunner()->PostDelayedTask(
       FROM_HERE, record_purge_suspend_metric_closure_.callback(),
       base::TimeDelta::FromSeconds(15));
 }
@@ skipping 150 matching lines @@
   UMA_HISTOGRAM_MEMORY_MB(
       "PurgeAndSuspend.Experimental.MemoryGrowth.V8MainThreadIsolateKB",
       GET_MEMORY_GROWTH(memory_metrics, purge_and_suspend_memory_metrics_,
                         v8_main_thread_isolate_mb) * 1024);
   UMA_HISTOGRAM_MEMORY_MB(
       "PurgeAndSuspend.Experimental.MemoryGrowth.TotalAllocatedKB",
       GET_MEMORY_GROWTH(memory_metrics, purge_and_suspend_memory_metrics_,
                         total_allocated_mb) * 1024);
 }
 
-void RenderThreadImpl::OnProcessResume() {
-  ChildThreadImpl::OnProcessResume();
-
-  if (!RendererIsHidden())
-    return;
-
-  // TODO(bashi): Enable the tab suspension when MemoryCoordinator is enabled.
-  if (base::FeatureList::IsEnabled(features::kMemoryCoordinator))
-    return;
-
-  if (base::FeatureList::IsEnabled(features::kPurgeAndSuspend)) {
-    // TODO(tasak): after enabling MemoryCoordinator, remove this Notify
-    // and follow MemoryCoordinator's request.
-    base::MemoryCoordinatorClientRegistry::GetInstance()->Notify(
-        base::MemoryState::NORMAL);
-  }
-}
-
 scoped_refptr<gpu::GpuChannelHost> RenderThreadImpl::EstablishGpuChannelSync() {
   TRACE_EVENT0("gpu", "RenderThreadImpl::EstablishGpuChannelSync");
 
   if (gpu_channel_) {
     // Do nothing if we already have a GPU channel or are already
     // establishing one.
     if (!gpu_channel_->IsLost())
       return gpu_channel_;
 
     // Recreate the channel if it has been lost.
@@ skipping 343 matching lines @@
 }
 
 void RenderThreadImpl::OnMemoryStateChange(base::MemoryState state) {
   // TODO(hajimehoshi): Adjust the size of this memory usage according to
   // |state|. RenderThreadImpl doesn't have a feature to limit memory usage at
   // present.
   if (blink_platform_impl_) {
     blink::WebMemoryCoordinator::onMemoryStateChange(
         static_cast<blink::MemoryState>(state));
   }
-  switch (state) {
-    case base::MemoryState::NORMAL:
-      break;
-    case base::MemoryState::THROTTLED:
-      // TODO(bashi): Figure out what kind of strategy is suitable on
-      // THROTTLED state. crbug.com/674815
-#if defined(OS_ANDROID)
-      OnTrimMemoryImmediately();
-#else
-      OnSyncMemoryPressure(
-          base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE);
-#endif
-      ReleaseFreeMemory();
-      break;
-    case base::MemoryState::SUSPENDED:
-      OnTrimMemoryImmediately();
-      ReleaseFreeMemory();
-      ClearMemory();
-      break;
-    case base::MemoryState::UNKNOWN:
-      NOTREACHED();
-      break;
-  }
+}
+
+void RenderThreadImpl::OnPurgeMemory() {
+  OnTrimMemoryImmediately();
+  ReleaseFreeMemory();
+  ClearMemory();
+  // TODO(bashi): Add onPurgeMemory() to blink::WebMemoryCoordinator.
+  // Notifies pseudo SUSPENDED state change to purge memory in blink.
+  // crbug.com/684287
+  OnMemoryStateChange(base::MemoryState::SUSPENDED);
 }
 
 void RenderThreadImpl::ClearMemory() {
   // Do not call into blink if it is not initialized.
   if (blink_platform_impl_) {
     // Purge Skia font cache, by setting it to 0 and then again to the
     // previous limit.
     size_t font_cache_limit = SkGraphics::SetFontCacheLimit(0);
     SkGraphics::SetFontCacheLimit(font_cache_limit);
   }
@@ skipping 179 matching lines @@
   }
 }
 
 void RenderThreadImpl::OnRendererInterfaceRequest(
     mojom::RendererAssociatedRequest request) {
   DCHECK(!renderer_binding_.is_bound());
   renderer_binding_.Bind(std::move(request));
 }
 
 }  // namespace content