Implement a JavaScript API for document scanning

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 481b72b139b520916b505b01b507458f85f0a58c..9c28594bfc248a21b2e62a38690a63e6b472f687 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -43219,6 +43219,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="906" label="FILESYSTEMPROVIDER_NOTIFY"/>
   <int value="907" label="USB_GETUSERSELECTEDDEVICES"/>
   <int value="908" label="INPUTMETHODPRIVATE_GETINPUTMETHODCONFIG"/>
+  <int value="909" label="DOCUMENT_SCAN_SCAN"/>
 </enum>
 
 <enum name="ExtensionInstallCause" type="int">
@@ -43400,6 +43401,12 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="60" label="kAccessibilityFeaturesModify"/>
   <int value="61" label="kAccessibilityFeaturesRead"/>
   <int value="62" label="kBluetoothPrivate"/>
+  <int value="63" label="kIdentityEmail"/>
+  <int value="64" label="kExperienceSamplingPrivate"/>
+  <int value="65" label="kCopresence"/>
+  <int value="66" label="kTopSites"/>
+  <int value="67" label="kU2fDevices"/>
+  <int value="68" label="kDocumentScan"/>
 </enum>
 
 <enum name="ExtensionServiceVerifyAllSuccess" type="int">