Add use-counters for use of CSS parsing in WebkitCSSMatrix.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 8c0819564ef32e230205a6f20aee1cf23de54863..15d9d5835cc3607b8ed87697bdfadff93ce98f5a 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -93303,6 +93303,54 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="1864" label="VRPoseLinearAcceleration"/>
   <int value="1865" label="VRPoseAngularVelocity"/>
   <int value="1866" label="VRPoseAngularAcceleration"/>
+  <int value="1867" label="CSSOverflowPaged"/>
+  <int value="1868" label="ChildSrcAllowedWorkerThatScriptSrcBlocked"/>
+  <int value="1869" label="HTMLTableElementPresentationAttributeBackground"/>
+  <int value="1870" label="V8Navigator_GetInstalledRelatedApps_Method"/>
+  <int value="1871" label="NamedAccessOnWindow_ChildBrowsingContext"/>
+  <int value="1872"
+      label="NamedAccessOnWindow_ChildBrowsingContext_CrossOriginNameMismatch"/>
+  <int value="1873" label="V0CustomElementsRegisterHTMLCustomTag"/>
+  <int value="1874" label="V0CustomElementsRegisterHTMLTypeExtension"/>
+  <int value="1875" label="V0CustomElementsRegisterSVGElement"/>
+  <int value="1876" label="V0CustomElementsRegisterEmbedderElement"/>
+  <int value="1877" label="V0CustomElementsCreateCustomTagElement"/>
+  <int value="1878" label="V0CustomElementsCreateTypeExtensionElement"/>
+  <int value="1879" label="V0CustomElementsConstruct"/>
+  <int value="1880" label="V8IDBObserver_Observe_Method"/>
+  <int value="1881" label="V8IDBObserver_Unobserve_Method"/>
+  <int value="1882" label="WebBluetoothRemoteCharacteristicGetDescriptor"/>
+  <int value="1883" label="WebBluetoothRemoteCharacteristicGetDescriptors"/>
+  <int value="1884" label="WebBluetoothRemoteCharacteristicReadValue"/>
+  <int value="1885" label="WebBluetoothRemoteCharacteristicWriteValue"/>
+  <int value="1886" label="WebBluetoothRemoteCharacteristicStartNotifications"/>
+  <int value="1887" label="WebBluetoothRemoteCharacteristicStopNotifications"/>
+  <int value="1888" label="WebBluetoothRemoteDescriptorReadValue"/>
+  <int value="1889" label="WebBluetoothRemoteDescriptorWriteValue"/>
+  <int value="1890" label="WebBluetoothRemoteServerConnect"/>
+  <int value="1891" label="WebBluetoothRemoteServerDisconnect"/>
+  <int value="1892" label="WebBluetoothRemoteServerGetPrimaryService"/>
+  <int value="1893" label="WebBluetoothRemoteServerGetPrimaryServices"/>
+  <int value="1894" label="WebBluetoothRemoteServiceGetCharacteristic"/>
+  <int value="1895" label="WebBluetoothRemoteServiceGetCharacteristics"/>
+  <int value="1896" label="HTMLContentElement"/>
+  <int value="1897" label="HTMLShadowElement"/>
+  <int value="1898" label="HTMLSlotElement"/>
+  <int value="1899" label="AccelerometerConstructor"/>
+  <int value="1900" label="AbsoluteOrientationSensorConstructor"/>
+  <int value="1901" label="AmbientLightSensorConstructor"/>
+  <int value="1902" label="GenericSensorOnActivate"/>
+  <int value="1903" label="GenericSensorOnChange"/>
+  <int value="1904" label="GenericSensorOnError"/>
+  <int value="1905" label="GenericSensorActivated"/>
+  <int value="1906" label="GyroscopeConstructor"/>
+  <int value="1907" label="MagnetometerConstructor"/>
+  <int value="1908" label="OrientationSensorPopulateMatrix"/>
+  <int value="1909" label="WindowOpenWithInvalidURL"/>
+  <int value="1910" label="CrossOriginMainFrameNulledNameAccessed"/>
+  <int value="1911" label="MenuItemElementIconAttribute"/>
+  <int value="1912" label="WebkitCSSMatrixSetMatrixValue"/>
+  <int value="1913" label="WebkitCSSMatrixConstructFromString"/>
 </enum>
 
 <enum name="FetchRequestMode" type="int">