Add some temporary logging to AwContentsGarbageCollectionTest

android_webview/native/aw_contents.cc

Index: android_webview/native/aw_contents.cc
diff --git a/android_webview/native/aw_contents.cc b/android_webview/native/aw_contents.cc
index 523c63772923cf611ed6c97dc7e318ca50a76687..75b35bf988ebb118299d7bc58d5b6ae4f8ff5a03 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -193,7 +193,10 @@ AwContents::AwContents(scoped_ptr<WebContents> web_contents)
               switches::kDisablePageVisibility)),
       web_contents_(std::move(web_contents)),
       renderer_manager_key_(GLViewRendererManager::GetInstance()->NullKey()) {
-  base::subtle::NoBarrier_AtomicIncrement(&g_instance_count, 1);
+  base::subtle::Atomic32 instance_count =
+      base::subtle::NoBarrier_AtomicIncrement(&g_instance_count, 1);
+  VLOG(2) << "AwContents::~AwContents " << this << " instance_count "
+          << instance_count;
   icon_helper_.reset(new IconHelper(web_contents_.get()));
   icon_helper_->SetListener(this);
   web_contents_->SetUserData(android_webview::kAwContentsUserDataKey,
@@ -302,6 +305,8 @@ AwContents::~AwContents() {
     base::MemoryPressureListener::NotifyMemoryPressure(
         base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL);
   }
+  VLOG(2) << "AwContents::~AwContents " << this << " instance_count "
+          << instance_count;
   AwContentsLifecycleNotifier::OnWebViewDestroyed();
 }