Adding dumpsys based power monitor for android.

tools/telemetry/telemetry/core/platform/__init__.py

Index: tools/telemetry/telemetry/core/platform/__init__.py
diff --git a/tools/telemetry/telemetry/core/platform/__init__.py b/tools/telemetry/telemetry/core/platform/__init__.py
index 76d6401017c9af659e9da150a3f0a1e837657999..902d73bd893836f04f2ff332561c79013805c3d5 100644
--- a/tools/telemetry/telemetry/core/platform/__init__.py
+++ b/tools/telemetry/telemetry/core/platform/__init__.py
@@ -167,48 +167,23 @@ class Platform(object):
     for t in self._platform_backend.StopVideoCapture():
       yield t
 
-  def CanMonitorPowerSync(self):
-    """Returns True iff power can be monitored synchronously via
-    MonitorPowerSync().
+  def CanMonitorPower(self):
+    """Returns True iff power can be monitored asynchronously via
+    StartMonitoringPower() and StopMonitoringPower().
     """
-    return self._platform_backend.CanMonitorPowerSync()
-
-  def MonitorPowerSync(self, duration_ms):
-    """Synchronously monitors power for |duration_ms|.
+    return self._platform_backend.CanMonitorPower()
 
-    Returns:
-      A dict of power utilization statistics containing: {
-        # The instantaneous power (voltage * current) reading in milliwatts at
-        # each sample.
-        'power_samples_mw': [mw0, mw1, ..., mwN],
+  def StartMonitoringPower(self, browser):
+    """Starts monitoring power utilization statistics.
 
-        # The total energy consumption during the sampling period in milliwatt
-        # hours. May be estimated by integrating power samples or may be exact
-        # on supported hardware.
-        'energy_consumption_mwh': mwh,
-
-        # A platform-specific dictionary of additional details about the
-        # utilization of individual hardware components.
-        hw_component_utilization: {
-           ...
-        }
-      }
-    """
-    return self._platform_backend.MonitorPowerSync(duration_ms)
-
-  def CanMonitorPowerAsync(self):
-    """Returns True iff power can be monitored asynchronously via
-    StartMonitoringPowerAsync() and StopMonitoringPowerAsync().
+    Args:
+      browser: The browser to monitor.
     """
-    return self._platform_backend.CanMonitorPowerAsync()
-
-  def StartMonitoringPowerAsync(self):
-    """Starts monitoring power utilization statistics."""
-    assert self._platform_backend.CanMonitorPowerAsync()
-    self._platform_backend.StartMonitoringPowerAsync()
+    assert self._platform_backend.CanMonitorPower()
+    self._platform_backend.StartMonitoringPower(browser)
 
-  def StopMonitoringPowerAsync(self):
-    """Stops monitoring power utilization and returns collects stats
+  def StopMonitoringPower(self):
+    """Stops monitoring power utilization and returns stats
 
     Returns:
       None if power measurement failed for some reason, otherwise a dict of
@@ -233,4 +208,4 @@ class Platform(object):
         }
       }
     """
-    return self._platform_backend.StopMonitoringPowerAsync()
+    return self._platform_backend.StopMonitoringPower()