Introduce chrome.bluetoothSocket API.

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 4a482cf89b505cf6754ebb909ee735c14b1d73cf..12133d8b78d774ec8ace449003f6a81a1a02b00d 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -33567,6 +33567,18 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="720" label="WEBCAMPRIVATE_SET"/>
   <int value="721" label="WEBCAMPRIVATE_RESET"/>
   <int value="722" label="WEBCAMPRIVATE_GET"/>
+  <int value="723" label="BLUETOOTHSOCKET_CREATE"/>
+  <int value="724" label="BLUETOOTHSOCKET_UPDATE"/>
+  <int value="725" label="BLUETOOTHSOCKET_SETPAUSED"/>
+  <int value="726" label="BLUETOOTHSOCKET_LISTENUSINGRFCOMM"/>
+  <int value="727" label="BLUETOOTHSOCKET_LISTENUSINGINSECURERFCOMM"/>
+  <int value="728" label="BLUETOOTHSOCKET_LISTENUSINGL2CAP"/>
+  <int value="729" label="BLUETOOTHSOCKET_CONNECT"/>
+  <int value="730" label="BLUETOOTHSOCKET_DISCONNECT"/>
+  <int value="731" label="BLUETOOTHSOCKET_CLOSE"/>
+  <int value="732" label="BLUETOOTHSOCKET_SEND"/>
+  <int value="733" label="BLUETOOTHSOCKET_GETINFO"/>
+  <int value="734" label="BLUETOOTHSOCKET_GETSOCKETS"/>
 </enum>
 
 <enum name="ExtensionInstallCause" type="int">