[DevTools] Add power profiler and power overview in timeline panel.

Source/core/testing/InspectorFrontendClientLocal.h

Index: Source/core/testing/InspectorFrontendClientLocal.h
diff --git a/Source/core/testing/InspectorFrontendClientLocal.h b/Source/core/testing/InspectorFrontendClientLocal.h
old mode 100644
new mode 100755
index a97b8d85005fe311d1a093e91449260f8bf9f2b5..cb2d67ce8797ac8e5657afc60925af1aff0dbdd8
--- a/Source/core/testing/InspectorFrontendClientLocal.h
+++ b/Source/core/testing/InspectorFrontendClientLocal.h
@@ -60,6 +60,11 @@ public:
 
     virtual bool isUnderTest() { return true; }
 
+    virtual void checkPowerProfileSupportedStatus() { }
+    virtual void startPowerProfile() { }
+    virtual void stopPowerProfile() { }
+    virtual void setPowerProfileResolution(unsigned) { }
+
 private:
     Page* m_frontendPage;
     // TODO(yurys): this ref shouldn't be needed.