[DevTools] Rework idle{Started,Finished} instrumentation.

third_party/WebKit/Source/platform/v8_inspector/V8DebuggerImpl.cpp

Index: third_party/WebKit/Source/platform/v8_inspector/V8DebuggerImpl.cpp
diff --git a/third_party/WebKit/Source/platform/v8_inspector/V8DebuggerImpl.cpp b/third_party/WebKit/Source/platform/v8_inspector/V8DebuggerImpl.cpp
index 2b94263b4be3e4a8b992a1c1fc6f544f725aebfb..2be6bf8f49ea9a9e6ea32c19950a394bca3ab932 100644
--- a/third_party/WebKit/Source/platform/v8_inspector/V8DebuggerImpl.cpp
+++ b/third_party/WebKit/Source/platform/v8_inspector/V8DebuggerImpl.cpp
@@ -42,6 +42,7 @@
 #include "platform/v8_inspector/V8StackTraceImpl.h"
 #include "platform/v8_inspector/V8StringUtil.h"
 #include "platform/v8_inspector/public/V8DebuggerClient.h"
+#include <v8-profiler.h>
 
 namespace blink {
 
@@ -809,6 +810,16 @@ void V8DebuggerImpl::didExecuteScript(v8::Local<v8::Context> context)
         agent->didExecuteScript();
 }
 
+void V8DebuggerImpl::idleStarted()
+{
+    m_isolate->GetCpuProfiler()->SetIdle(true);
+}
+
+void V8DebuggerImpl::idleFinished()
+{
+    m_isolate->GetCpuProfiler()->SetIdle(false);
+}
+
 PassOwnPtr<V8StackTrace> V8DebuggerImpl::captureStackTrace(size_t maxStackSize)
 {
     V8DebuggerAgentImpl* agent = findEnabledDebuggerAgent(m_isolate->GetCurrentContext());