ime: Add ime API for changing the composition range.

Adds a new ime API for Chrome OS and Windows that allows extensions to
change the composition range (SetCompositionFromExistingText).

[email protected]

Bug: 952757
Change-Id: Ia7ecfebb0ed7bd7ba1d098a22961d727b949fc05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1585822
Commit-Queue: Darren Shen <[email protected]>
Reviewed-by: Darren Shen <[email protected]>
Reviewed-by: Shu Chen <[email protected]>
Cr-Commit-Position: refs/heads/master@{#661577}
diff --git a/extensions/browser/extension_function_histogram_value.h b/extensions/browser/extension_function_histogram_value.h
index ee96fba..0596bb4 100644
--- a/extensions/browser/extension_function_histogram_value.h
+++ b/extensions/browser/extension_function_histogram_value.h
@@ -1399,6 +1399,7 @@
   AUTOTESTPRIVATE_SETSHELFALIGNMENT = 1336,
   BLUETOOTH_RECORDPAIRING = 1337,
   FILEMANAGERPRIVATE_SETARCSTORAGETOASTSHOWNFLAG = 1338,
+  INPUTMETHODPRIVATE_SETCOMPOSITIONRANGE = 1339,
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py
   ENUM_BOUNDARY