memory coordinator: Sends notifications to V8 on THROTTLED state

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 920dad7d4de0fc70fbfcc186fc8b34a6d49dfab7..28eb4e2dc9fa701c064f512c6bbe8afb78a37e34 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -2264,6 +2264,14 @@ void RenderThreadImpl::OnMemoryStateChange(base::MemoryState state) {
       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: