Implement frame attribution (FrameBlamer)

third_party/WebKit/Source/platform/TraceEvent.h

Index: third_party/WebKit/Source/platform/TraceEvent.h
diff --git a/third_party/WebKit/Source/platform/TraceEvent.h b/third_party/WebKit/Source/platform/TraceEvent.h
index b2d51c05913d706cfeadaa873c662fbde7eee251..4770247b878a9181efea0ed8ef8dd8ace3c1825c 100644
--- a/third_party/WebKit/Source/platform/TraceEvent.h
+++ b/third_party/WebKit/Source/platform/TraceEvent.h
@@ -291,11 +291,12 @@ const unsigned long long noBindId = 0;
 // with the Process ID so that they are unlikely to collide when the same
 // pointer is used on different processes.
 class TraceID final {
-    STACK_ALLOCATED();
+    DISALLOW_NEW();
     WTF_MAKE_NONCOPYABLE(TraceID);
 public:
     class WithScope final {
-        STACK_ALLOCATED();
+        DISALLOW_NEW();
+
     public:
         template<typename T> WithScope(const char* scope, T id)
             : m_scope(scope), m_data(reinterpret_cast<unsigned long long>(id)) { }
@@ -307,7 +308,8 @@ public:
     };
 
     template<bool dummyMangle> class MangleBehavior final {
-        STACK_ALLOCATED();
+        DISALLOW_NEW();
+
     public:
         template<typename T> explicit MangleBehavior(T id) : m_data(reinterpret_cast<unsigned long long>(id)) { }
         explicit MangleBehavior(WithScope scopedID) : m_scope(scopedID.scope()), m_data(scopedID.data()) { }
@@ -369,7 +371,8 @@ union TraceValueUnion {
 
 // Simple container for const char* that should be copied instead of retained.
 class TraceStringWithCopy {
-    STACK_ALLOCATED();
+    DISALLOW_NEW();
+
 public:
     explicit TraceStringWithCopy(const char* str) : m_str(str) { }
     const char* str() const { return m_str; }
@@ -594,7 +597,7 @@ static inline TraceEventHandle addTraceEvent(
 
 // Used by TRACE_EVENTx macro. Do not use directly.
 class ScopedTracer final {
-    STACK_ALLOCATED();
+    DISALLOW_NEW();
     WTF_MAKE_NONCOPYABLE(ScopedTracer);
 public:
     // Note: members of m_data intentionally left uninitialized. See initialize.
@@ -634,7 +637,7 @@ private:
 // the sampling state having recorded.
 template<size_t BucketNumber>
 class SamplingStateScope final {
-    STACK_ALLOCATED();
+    DISALLOW_NEW();
     WTF_MAKE_NONCOPYABLE(SamplingStateScope);
 public:
     SamplingStateScope(const char* categoryAndName)
@@ -663,7 +666,7 @@ private:
 };
 
 template<typename IDType> class TraceScopedTrackableObject {
-    STACK_ALLOCATED();
+    DISALLOW_NEW();
     WTF_MAKE_NONCOPYABLE(TraceScopedTrackableObject);
 public:
     TraceScopedTrackableObject(const char* categoryGroup, const char* name, IDType id)
@@ -672,6 +675,12 @@ public:
         TRACE_EVENT_OBJECT_CREATED_WITH_ID(m_categoryGroup, m_name, m_id);
     }
 
+    template <typename ArgType>
+    void snapshot(ArgType snapshot) const
+    {
+        TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(m_categoryGroup, m_name, m_id, snapshot);
+    }
+
     ~TraceScopedTrackableObject()
     {
         TRACE_EVENT_OBJECT_DELETED_WITH_ID(m_categoryGroup, m_name, m_id);