Pepper: Log in UMA when an interface is used.

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 d1a1a1030dc9e6a44c3401bee9e6867d3cf3900a..bc774c2354c67d053794f51f2e622665d0367107 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -12712,6 +12712,13 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="Pepper.InterfaceUsed" enum="PepperInterface">
+  <summary>
+    The number of out-of-process plugin processes that have loaded a particular
+    PPB interface version.
+  </summary>
+</histogram>
+
 <histogram name="PerformanceMonitor.AverageCPU" units="PercentCPUUsage">
   <summary>
     Average CPU utilization of a process, read out at each two-minute interval.
@@ -29024,6 +29031,152 @@ other types of suffix sets.
   <int value="2" label="Match"/>
 </enum>
 
+<enum name="PepperInterface" type="int">
+  <int value="-2147196937" label="PPB_FlashFullscreen;0.1"/>
+  <int value="-2138723540" label="PPB_Testing_Private;1.0"/>
+  <int value="-2133821488" label="PPB_CharSet(Dev);0.4"/>
+  <int value="-2119296280" label="PPB_IMEInputEvent(Dev);0.2"/>
+  <int value="-2067775374" label="PPB_TCPSocket;1.1"/>
+  <int value="-2037123574" label="PPB_Var;1.1"/>
+  <int value="-2009064758" label="PPB_Memory(Dev);0.1"/>
+  <int value="-1993950941" label="PPB_Buffer(Dev);0.4"/>
+  <int value="-1985376383" label="PPB_NetworkMonitor;1.0"/>
+  <int value="-1966577434" label="PPB_Instance_Private;0.1"/>
+  <int value="-1925681219" label="PPB_URLUtil(Dev);0.7"/>
+  <int value="-1921277384" label="PPB_FileRef;1.1"/>
+  <int value="-1798576259" label="PPB_TCPSocket_Private;0.4"/>
+  <int value="-1558951241" label="PPB_Graphics2D;1.1"/>
+  <int value="-1531672593" label="PPB_Flash_MessageLoop;0.1"/>
+  <int value="-1518391475" label="PPB_VideoCapture(Dev);0.3"/>
+  <int value="-1516271583" label="PPB_MouseInputEvent;1.0"/>
+  <int value="-1478859543" label="PPB_Flash_DeviceID;1.0"/>
+  <int value="-1383737260" label="PPB_NaCl_Private;1.0"/>
+  <int value="-1375060058" label="PPB_TouchInputEvent;1.0"/>
+  <int value="-1366571459" label="PPB_Alarms(Dev);0.1"/>
+  <int value="-1352116847" label="PPB_Trace_Event(Dev);0.2"/>
+  <int value="-1291306207" label="PPB_VarArray;1.0"/>
+  <int value="-1264436703" label="PPB_OpenGLES2ChromiumMapSub;1.0"/>
+  <int value="-1257258542" label="PPB_FileChooserTrusted;0.6"/>
+  <int value="-1253853798" label="PPB_VarArrayBuffer;1.0"/>
+  <int value="-1233561239" label="PPB_NetworkProxy;1.0"/>
+  <int value="-1231037243" label="PPB_URLUtil(Dev);0.6"/>
+  <int value="-1216696786" label="PPB_Flash_Clipboard;5.0"/>
+  <int value="-1203322583" label="PPB_Flash_DRM;1.1"/>
+  <int value="-1200967794" label="PPB_View(Dev);0.1"/>
+  <int value="-1182888600" label="PPB_BrokerTrusted;0.2"/>
+  <int value="-1181935021" label="PPB_Audio;1.1"/>
+  <int value="-1138989947" label="PPB_UDPSocket;1.0"/>
+  <int value="-1108277307" label="PPB_UDPSocket_Private;0.2"/>
+  <int value="-1105425286" label="PPB_Core;1.0"/>
+  <int value="-1082443375" label="PPB_KeyboardInputEvent;1.2"/>
+  <int value="-1035486015" label="PPB_AudioInput(Dev);0.4"/>
+  <int value="-985637787" label="PPB_NetAddress_Private;1.0"/>
+  <int value="-974155824" label="PPB_OpenGLES2ChromiumEnableFeature;1.0"/>
+  <int value="-958770725" label="PPB_Talk_Private;2.0"/>
+  <int value="-929128938" label="PPB_VideoFrame;0.1"/>
+  <int value="-886493628" label="PPB_Ext_Socket(Dev);0.2"/>
+  <int value="-874803972" label="PPB_TCPSocket_Private;0.5"/>
+  <int value="-831236894" label="PPB_KeyboardInputEvent;1.0"/>
+  <int value="-819114211" label="PPB_Talk_Private;1.0"/>
+  <int value="-810399223" label="PPB_View;1.0"/>
+  <int value="-792956962" label="PPB_FileIO_Private;0.1"/>
+  <int value="-790276418" label="PPB_DeviceRef(Dev);0.1"/>
+  <int value="-789288204" label="PPB_CharSet_Trusted;1.0"/>
+  <int value="-787040048" label="PPB_OpenGLES2FramebufferMultisample;1.0"/>
+  <int value="-772507270" label="PPB_OpenGLES2Query;1.0"/>
+  <int value="-709758836" label="PPB_AudioConfig;1.0"/>
+  <int value="-642792249" label="PPB_Flash;13.0"/>
+  <int value="-639291233" label="PPB_VarDictionary;1.0"/>
+  <int value="-628351231" label="PPB_FileSystem;1.0"/>
+  <int value="-627062709" label="PPB_MouseCursor;1.0"/>
+  <int value="-618650788" label="PPB_FileChooser(Dev);0.6"/>
+  <int value="-506446084" label="PPB_VideoSource_Private;0.1"/>
+  <int value="-501892099" label="PPB_Widget(Dev);0.3"/>
+  <int value="-469524661" label="PPB_ImageData;1.0"/>
+  <int value="-466609845" label="PPB_Console;1.0"/>
+  <int value="-367584112" label="PPB_Flash_Print;1.0"/>
+  <int value="-202751722" label="PPB_URLRequestInfo;1.0"/>
+  <int value="-153374924" label="PPB_Flash_File_FileRef;2"/>
+  <int value="-149209298" label="PPB_Font(Dev);0.6"/>
+  <int value="-143705092" label="PPB_MouseInputEvent;1.1"/>
+  <int value="-142191926" label="PPB_NetAddress_Private;1.1"/>
+  <int value="-134838149" label="PPB_Find(Dev);0.3"/>
+  <int value="-123732472" label="PPB_Printing(Dev);0.7"/>
+  <int value="-120705653" label="PPB_VideoDecoder(Dev);0.16"/>
+  <int value="-119712884" label="PPB_UDPSocket_Private;0.3"/>
+  <int value="-116156316" label="PPB_TextInput(Dev);0.1"/>
+  <int value="-84708594" label="PPB_IMEInputEvent(Dev);0.1"/>
+  <int value="-76853424" label="PPB_AudioInput(Dev);0.3"/>
+  <int value="-51537649" label="PPB_NetAddress_Private;0.1"/>
+  <int value="-24258574" label="PPB_HostResolver_Private;0.1"/>
+  <int value="-21287019" label="PPB_UDPSocket_Private;0.4"/>
+  <int value="2804066" label="PPB_AudioConfig;1.1"/>
+  <int value="22816901" label="PPB_FileChooser(Dev);0.5"/>
+  <int value="37307420" label="PPB_Scrollbar(Dev);0.5"/>
+  <int value="62905097" label="PPB_TrueTypeFont(Dev);0.1"/>
+  <int value="153443470" label="PPB_URLResponseInfo;1.0"/>
+  <int value="229560990" label="PPB_Var(Deprecated);0.3"/>
+  <int value="250764663" label="PPB_Graphics2D(Dev);0.2"/>
+  <int value="320267009" label="PPB_Flash_File_ModuleLocal;3"/>
+  <int value="382780521" label="PPB_FileRef;1.2"/>
+  <int value="415548516" label="PPB_MessageLoop;1.0"/>
+  <int value="434146763" label="PPB_BrowserFont_Trusted;1.0"/>
+  <int value="495324603" label="PPB_Widget(Dev);0.4"/>
+  <int value="556941117" label="PPB_IMEInputEvent;1.0"/>
+  <int value="612625164" label="PPB_InputEvent;1.0"/>
+  <int value="632306545" label="PPB_FileRef;1.0"/>
+  <int value="656561383" label="PPB_FlashFullscreen;1.0"/>
+  <int value="657117235" label="PPB_Flash_DRM;1.0"/>
+  <int value="714324031" label="PPB_Graphics3D;1.0"/>
+  <int value="724664149" label="PPB_Flash_Menu;0.2"/>
+  <int value="760024173" label="PPB_FileIO;1.0"/>
+  <int value="804011173" label="PPB_Gamepad;1.0"/>
+  <int value="810111568" label="PPB_Messaging;1.0"/>
+  <int value="829878300" label="PPB_TCPSocket;1.0"/>
+  <int value="835840137" label="PPB_WebSocket;1.0"/>
+  <int value="844787073" label="PPB_TextInput(Dev);0.2"/>
+  <int value="857934187" label="PPB_Ext_Socket(Dev);0.1"/>
+  <int value="897332014" label="PPB_Zoom(Dev);0.2"/>
+  <int value="910782902" label="PPB_AudioFrame;0.1"/>
+  <int value="941275733" label="PPB_Flash;12.6"/>
+  <int value="948969343" label="PPB_OpenGLES2;1.0"/>
+  <int value="961317980" label="PPB_Fullscreen;1.0"/>
+  <int value="972914533" label="PPB_TextInputController;1.0"/>
+  <int value="997459960" label="PPB_FileChooserTrusted;0.5"/>
+  <int value="1017579801" label="PPB_OpenGLES2FramebufferBlit;1.0"/>
+  <int value="1032125598" label="PPB_HostResolver;1.0"/>
+  <int value="1050892821" label="PPB_OpenGLES2InstancedArrays;1.0"/>
+  <int value="1055791466" label="PPB_CursorControl(Dev);0.4"/>
+  <int value="1086644401" label="PPB_Proxy_Private;6"/>
+  <int value="1094761313" label="PPB_URLLoaderTrusted;0.3"/>
+  <int value="1099975614" label="PPB_Flash;12.5"/>
+  <int value="1155638369" label="PPB_WheelInputEvent;1.0"/>
+  <int value="1262240942" label="PPB_FileIO;1.1"/>
+  <int value="1316320941" label="PPB_Graphics2D(Dev);0.1"/>
+  <int value="1321620067" label="PPB_Instance;1.0"/>
+  <int value="1374404330" label="PPB_BrokerTrusted;0.3"/>
+  <int value="1443771913" label="PPB_NetAddress;1.0"/>
+  <int value="1465557812" label="PPB_VarResource(Dev);0.1"/>
+  <int value="1505595424" label="PPB_Crypto(Dev);0.1"/>
+  <int value="1703245231" label="PPB_NetworkList;1.0"/>
+  <int value="1721408268" label="PPB_URLLoader;1.0"/>
+  <int value="1753813390" label="PPB_Flash_Clipboard;4.0"/>
+  <int value="1773992510" label="PPB_PDF;1"/>
+  <int value="1775059283" label="PPB_Flash_FontFile;0.1"/>
+  <int value="1821321578" label="PPB_UMA_Private;0.2"/>
+  <int value="1822250569" label="PPB_Trace_Event(Dev);0.1"/>
+  <int value="1838344955" label="PPB_Flash;12.4"/>
+  <int value="1866591098" label="PPB_FileRefPrivate;0.1"/>
+  <int value="1870131254" label="PPB_MouseLock;1.0"/>
+  <int value="1930785273" label="PPB_Var;1.0"/>
+  <int value="1978180250" label="PPB_Flash_Clipboard;5.1"/>
+  <int value="1980463089" label="PPB_View;1.1"/>
+  <int value="1981643755" label="PPB_FileMapping;0.1"/>
+  <int value="2019398562" label="PPB_TCPSocket_Private;0.3"/>
+  <int value="2024537413" label="PPB_Graphics2D;1.0"/>
+  <int value="2056532375" label="PPB_Audio;1.0"/>
+</enum>
+
 <enum name="PepperVideoDecodeError" type="int">
   <int value="1" label="Illegal state">
     An operation was attempted during an incompatible decoder state.