[not for review] Add Draw entries to window Performance Timeline

Source/core/frame/Frame.cpp

Index: Source/core/frame/Frame.cpp
diff --git a/Source/core/frame/Frame.cpp b/Source/core/frame/Frame.cpp
index f3b756c49ab99af3821ed84e453db9e427d38231..58707e3fba00b5c77294e5b74e2e0df716103e0a 100644
--- a/Source/core/frame/Frame.cpp
+++ b/Source/core/frame/Frame.cpp
@@ -56,6 +56,18 @@ namespace blink {
 
 using namespace HTMLNames;
 
+namespace {
+
+int64_t generateFrameID()

[enne (OOO), 2014/07/22 20:45:26]

style nit: FrameID => FrameId

Does Blink have some equivalent of base::StaticAtomicSequenceNumber?

+{
+    // Initialize to the current time to reduce the likelihood of generating
+    // identifiers that overlap with those from past/future browser sessions.
+    static int64_t next = static_cast<int64_t>(currentTime() * 1000000.0);
+    return ++next;
+}
+
+} // namespace
+
 DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, frameCounter, ("Frame"));
 
 Frame::Frame(FrameClient* client, FrameHost* host, FrameOwner* owner)
@@ -63,6 +75,7 @@ Frame::Frame(FrameClient* client, FrameHost* host, FrameOwner* owner)
     , m_host(host)
     , m_owner(owner)
     , m_client(client)
+    , m_frameID(generateFrameID())
     , m_remotePlatformLayer(0)
 {
     ASSERT(page());