NOT YET READY: UMA recording the kind of target frame when extensions pierce browsing instance.

tools/metrics/histograms/enums.xml

Index: tools/metrics/histograms/enums.xml
diff --git a/tools/metrics/histograms/enums.xml b/tools/metrics/histograms/enums.xml
index b9e3632346456e354a69e84013ec720574a677da..28d1820a49a73d6838f8157bf671d3a7e6716d27 100644
--- a/tools/metrics/histograms/enums.xml
+++ b/tools/metrics/histograms/enums.xml
@@ -12828,6 +12828,8 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="4" label="HOSTED_APP"/>
   <int value="5" label="LEGACY_PACKAGED_APP"/>
   <int value="6" label="PLATFORM_APP"/>
+  <int value="7" label="SHARED_MODULE"/>
+  <int value="8" label="NUM_LOAD_TYPES"/>
 </enum>
 
 <enum name="ExtensionUninstallDialogAction" type="int">
@@ -12891,6 +12893,20 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="35" label="CRX_EXPECTED_HASH_INVALID"/>
 </enum>
 
+<enum name="ExtensionViewType" type="int">
+  <int value="0" label="INVALID"/>
+  <int value="1" label="APP_WINDOW"/>
+  <int value="2" label="BACKGROUND_CONTENTS"/>
+  <int value="3" label="COMPONENT"/>
+  <int value="4" label="EXTENSION_BACKGROUND_PAGE"/>
+  <int value="5" label="EXTENSION_DIALOG"/>
+  <int value="6" label="EXTENSION_GUEST"/>
+  <int value="7" label="EXTENSION_POPUP"/>
+  <int value="8" label="LAUNCHER_PAGE"/>
+  <int value="9" label="PANEL"/>
+  <int value="10" label="TAB_CONTENTS"/>
+</enum>
+
 <enum name="ExternalDeviceAction" type="int">
   <int value="0" label="Import to Drive"/>
   <int value="1" label="View files"/>