memory coordinator: Resume suspended renderer on NORMAL state change

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 2d6fd854c9b61c5d3f5307310737f119d2068f39..920dad7d4de0fc70fbfcc186fc8b34a6d49dfab7 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1894,7 +1894,6 @@ void RenderThreadImpl::OnProcessResume() {
     // and follow MemoryCoordinator's request.
     base::MemoryCoordinatorClientRegistry::GetInstance()->Notify(
         base::MemoryState::NORMAL);
-    renderer_scheduler_->ResumeRenderer();
   }
 }
 
@@ -2261,8 +2260,10 @@ void RenderThreadImpl::OnMemoryStateChange(base::MemoryState state) {
   }
   switch (state) {
     case base::MemoryState::NORMAL:
+      ResumeRenderer();
       break;
     case base::MemoryState::THROTTLED:
+      ResumeRenderer();
       ReleaseFreeMemory();
       break;
     case base::MemoryState::SUSPENDED:
@@ -2275,12 +2276,18 @@ void RenderThreadImpl::OnMemoryStateChange(base::MemoryState state) {
 }
 
 void RenderThreadImpl::SuspendRenderer() {
+  DCHECK(IsMainThread());
   OnTrimMemoryImmediately();
   ReleaseFreeMemory();
   ClearMemory();
   renderer_scheduler_->SuspendRenderer();
 }
 
+void RenderThreadImpl::ResumeRenderer() {
+  DCHECK(IsMainThread());
+  renderer_scheduler_->ResumeRenderer();
+}
+
 void RenderThreadImpl::ClearMemory() {
   // Do not call into blink if it is not initialized.
   if (blink_platform_impl_) {