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

Source/core/inspector/InspectorFrontendHost.idl

Index: Source/core/inspector/InspectorFrontendHost.idl
diff --git a/Source/core/inspector/InspectorFrontendHost.idl b/Source/core/inspector/InspectorFrontendHost.idl
old mode 100644
new mode 100755
index 467e7aa563e4807429c52605f1ddbb71095bcd6e..ac76e88126276c1f940194ebf6f2b5bf49f15867
--- a/Source/core/inspector/InspectorFrontendHost.idl
+++ b/Source/core/inspector/InspectorFrontendHost.idl
@@ -57,4 +57,9 @@
     void upgradeDraggedFileSystemPermissions(DOMFileSystem domFileSystem);
 
     boolean isUnderTest();
+
+    void checkPowerProfileSupportedStatus();

[pfeldman, 2014/01/09 11:38:52]

These should not be defined in the front-end embedder interface, but rather be
exposed as a part of the remote debugging protocol. The rationale is that you
should query power data from the target device, not necessarily the device that
renders the front-end. You could either declare a new domain "Power" in the
protocol.json for that or make power data sent along with the timeline records.

+    void startPowerProfile();
+    void stopPowerProfile();
+    void setPowerProfileResolution(unsigned long resolution);
 };