memory coordinator: Sends notifications to V8 on THROTTLED state

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 2246 matching lines @@
   if (blink_platform_impl_) {
     blink::WebMemoryCoordinator::onMemoryStateChange(
         static_cast<blink::MemoryState>(state));
   }
   switch (state) {
     case base::MemoryState::NORMAL:
       ResumeRenderer();
       break;
     case base::MemoryState::THROTTLED:
       ResumeRenderer();
+      // 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:
       SuspendRenderer();
       break;
     case base::MemoryState::UNKNOWN:
       NOTREACHED();
       break;
   }
 }
@@ skipping 201 matching lines @@
   }
 }
 
 void RenderThreadImpl::OnRendererInterfaceRequest(
     mojom::RendererAssociatedRequest request) {
   DCHECK(!renderer_binding_.is_bound());
   renderer_binding_.Bind(std::move(request));
 }
 
 }  // namespace content