Purge memory before suspending timer queues when backgrounded.

content/renderer/renderer_blink_platform_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 32 matching lines @@
 class WebSecurityOrigin;
 class WebServiceWorkerCacheStorage;
 }
 
 namespace service_manager {
 class InterfaceProvider;
 }
 
 namespace content {
 class BlinkInterfaceProviderImpl;
+class ChildMemoryCoordinatorImpl;
 class LocalStorageCachedAreas;
 class PlatformEventObserverBase;
 class QuotaMessageFilter;
 class RendererClipboardDelegate;
 class ThreadSafeSender;
 class WebClipboardImpl;
 class WebDatabaseObserverImpl;
 
 class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
  public:
   RendererBlinkPlatformImpl(
       blink::scheduler::RendererScheduler* renderer_scheduler,
-      base::WeakPtr<service_manager::InterfaceProvider> remote_interfaces);
+      base::WeakPtr<service_manager::InterfaceProvider> remote_interfaces,
+      ChildMemoryCoordinatorImpl* memory_coordinator);
   ~RendererBlinkPlatformImpl() override;
 
   // Shutdown must be called just prior to shutting down blink.
   void Shutdown();
 
   void set_plugin_refresh_allowed(bool plugin_refresh_allowed) {
     plugin_refresh_allowed_ = plugin_refresh_allowed;
   }
   // Platform methods:
   blink::WebClipboard* clipboard() override;
@@ skipping 148 matching lines @@
   // is invoked.
   static void SetMockDeviceOrientationDataForTesting(
       const blink::WebDeviceOrientationData& data);
 
   WebDatabaseObserverImpl* web_database_observer_impl() {
     return web_database_observer_impl_.get();
   }
 
   blink::WebURLLoader* createURLLoader() override;
 
+  void requestPurgeMemory() override;
+
  private:
   bool CheckPreparsedJsCachingEnabled() const;
 
   // Factory that takes a type and return PlatformEventObserverBase that matches
   // it.
   static std::unique_ptr<PlatformEventObserverBase>
   CreatePlatformEventObserverFromType(blink::WebPlatformEventType type);
 
   // Use the data previously set via SetMockDevice...DataForTesting() and send
   // them to the registered listener.
@@ skipping 46 matching lines @@
   TopLevelBlameContext top_level_blame_context_;
 
   WebTrialTokenValidatorImpl trial_token_validator_;
 
   std::unique_ptr<LocalStorageCachedAreas> local_storage_cached_areas_;
 
   std::unique_ptr<BlinkInterfaceProviderImpl> blink_interface_provider_;
 
   mojom::URLLoaderFactoryAssociatedPtr url_loader_factory_;
 
+  ChildMemoryCoordinatorImpl* memory_coordinator_;  // NOT OWNED
+
   DISALLOW_COPY_AND_ASSIGN(RendererBlinkPlatformImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDERER_BLINK_PLATFORM_IMPL_H_