Revert of Move and rename TaskTimeTracker to public interface exposed to ...

third_party/WebKit/Source/core/inspector/InspectorWebPerfAgent.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorWebPerfAgent.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorWebPerfAgent.cpp b/third_party/WebKit/Source/core/inspector/InspectorWebPerfAgent.cpp
index ca99b2cb9c76934327c9efc4c8e86bee3e3a56b1..ad4732b0535a11de6d56e0d585d9b953eb97cfea 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorWebPerfAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorWebPerfAgent.cpp
@@ -4,40 +4,22 @@
 
 #include "core/inspector/InspectorWebPerfAgent.h"
 
-#include "core/InstrumentingAgents.h"
 #include "core/frame/LocalFrame.h"
-#include "core/frame/Location.h"
 #include "core/inspector/InspectedFrames.h"
-#include "public/platform/Platform.h"
 
 namespace blink {
 
 InspectorWebPerfAgent::InspectorWebPerfAgent(InspectedFrames* inspectedFrames)
     : m_inspectedFrames(inspectedFrames)
 {
-    Platform::current()->currentThread()->addTaskTimeObserver(this);
-    Platform::current()->currentThread()->addTaskObserver(this);
 }
 
 InspectorWebPerfAgent::~InspectorWebPerfAgent()
 {
-    Platform::current()->currentThread()->removeTaskTimeObserver(this);
-    Platform::current()->currentThread()->removeTaskObserver(this);
 }
 
 void InspectorWebPerfAgent::willExecuteScript(ExecutionContext* context)
 {
-    // Heuristic for minimal frame context attribution: for the first script seen
-    // within a toplevel message loop task - record the URL for the ExecutionContext.
-    if (m_firstScriptSeen)
-        return;
-    m_firstScriptSeen = true;
-    Location* location = context->isDocument() ? toDocument(context)->location() : nullptr;
-    if (location) {
-        m_frameContextURL = std::string(location->protocol().ascii().data()) + "//"
-            + location->hostname().ascii().data()
-            + location->pathname().ascii().data();
-    }
 }
 
 void InspectorWebPerfAgent::didExecuteScript()
@@ -46,10 +28,6 @@
 
 void InspectorWebPerfAgent::willProcessTask()
 {
-    // Reset m_frameContextURL. We don't reset this in didProcessTask as
-    // it is needed in ReportTaskTime which occurs after didProcessTask.
-    m_firstScriptSeen = false;
-    m_frameContextURL = "";
 }
 
 void InspectorWebPerfAgent::didProcessTask()