[jumbo] Unduplicate duplicated IsShuttingDown

Quick fix to unbreak jumbo builds. In
https://chromium-review.googlesource.com/c/chromium/src/+/1205976
a copy of IsShuttingDown was added and this patch changes the code
to instead use the original version.

TBR=kinuko@chromium.org,nhiroki@chromium.org

Bug: 715632
Change-Id: I2451fcaa009ec6403827cdb05cd3b47112c4681b
Reviewed-on: https://chromium-review.googlesource.com/1209703Reviewed-by: Daniel Bratell <bratell@opera.com>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#589148}

content/browser/shared_worker/shared_worker_host.cc

@@ -61,11 +61,6 @@ bool AllowIndexedDBOnIOThread(const GURL& url,
       url, name, resource_context, render_frames);
 }
 
-bool IsShuttingDown(RenderProcessHost* host) {
-  return !host || host->FastShutdownStarted() ||
-         host->IsKeepAliveRefCountDisabled();
-}
-
 }  // namespace
 
 // RAII helper class for talking to SharedWorkerDevToolsManager.

content/browser/shared_worker/shared_worker_service_impl.cc

@@ -56,11 +56,6 @@ using StartLoaderCallback =
                             blink::mojom::SharedWorkerMainScriptLoadParamsPtr,
                             base::Optional<SubresourceLoaderParams>)>;
 
-bool IsShuttingDown(RenderProcessHost* host) {
-  return !host || host->FastShutdownStarted() ||
-         host->IsKeepAliveRefCountDisabled();
-}
-
 std::unique_ptr<URLLoaderFactoryBundleInfo> CreateFactoryBundle(
     int process_id,
     StoragePartitionImpl* storage_partition,
@@ -221,6 +216,11 @@ void CreateScriptLoaderOnIO(
 
 }  // namespace
 
+bool IsShuttingDown(RenderProcessHost* host) {
+  return !host || host->FastShutdownStarted() ||
+         host->IsKeepAliveRefCountDisabled();
+}
+
 SharedWorkerServiceImpl::SharedWorkerServiceImpl(
     StoragePartitionImpl* storage_partition,
     scoped_refptr<ServiceWorkerContextWrapper> service_worker_context,

content/browser/shared_worker/shared_worker_service_impl.h

@@ -36,6 +36,9 @@ class SharedWorkerHost;
 class StoragePartitionImpl;
 struct SubresourceLoaderParams;
 
+// Shared helper function
+bool IsShuttingDown(RenderProcessHost* host);
+
 // Created per StoragePartition.
 class CONTENT_EXPORT SharedWorkerServiceImpl : public SharedWorkerService {
  public: