Move PresentationAttributeCacheCleaner timer to main thread's timer task runner.

third_party/WebKit/Source/core/dom/PresentationAttributeStyle.cpp

Index: third_party/WebKit/Source/core/dom/PresentationAttributeStyle.cpp
diff --git a/third_party/WebKit/Source/core/dom/PresentationAttributeStyle.cpp b/third_party/WebKit/Source/core/dom/PresentationAttributeStyle.cpp
index ab70f6598b9e000089e4166b3922f10296254bf4..e014e49f24f243ffc15f43e555d462b530337018 100644
--- a/third_party/WebKit/Source/core/dom/PresentationAttributeStyle.cpp
+++ b/third_party/WebKit/Source/core/dom/PresentationAttributeStyle.cpp
@@ -35,6 +35,9 @@
 #include "core/dom/Element.h"
 #include "core/html/HTMLInputElement.h"
 #include "platform/Timer.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebScheduler.h"
+#include "public/platform/WebThread.h"
 #include "wtf/HashFunctions.h"
 #include "wtf/HashMap.h"
 #include "wtf/text/CString.h"
@@ -76,6 +79,9 @@ static PresentationAttributeCache& presentationAttributeCache() {
   return cache;
 }
 
+// This is a singleton (held via DEFINE_STATIC_LOCAL).
+// Thus it is appropriate to use the main thread's timer task runner, rather
+// than one associated with a particular frame.
 class PresentationAttributeCacheCleaner {
   WTF_MAKE_NONCOPYABLE(PresentationAttributeCacheCleaner);
   USING_FAST_MALLOC(PresentationAttributeCacheCleaner);
@@ -83,7 +89,10 @@ class PresentationAttributeCacheCleaner {
  public:
   PresentationAttributeCacheCleaner()
       : m_hitCount(0),
-        m_cleanTimer(this, &PresentationAttributeCacheCleaner::cleanCache) {}
+        m_cleanTimer(
+            Platform::current()->mainThread()->scheduler()->timerTaskRunner(),
+            this,
+            &PresentationAttributeCacheCleaner::cleanCache) {}
 
   void didHitPresentationAttributeCache() {
     if (presentationAttributeCache().size() <
@@ -113,7 +122,7 @@ class PresentationAttributeCacheCleaner {
   }
 
   unsigned m_hitCount;
-  Timer<PresentationAttributeCacheCleaner> m_cleanTimer;
+  TaskRunnerTimer<PresentationAttributeCacheCleaner> m_cleanTimer;
 };
 
 static bool attributeNameSort(const std::pair<StringImpl*, AtomicString>& p1,