Adds UMA histograms for desktop tab and audio capture through

JavaScript chrome.chooseDesktopMedia.

BUG=557222

Review URL: https://codereview.chromium.org/1825633002

Cr-Commit-Position: refs/heads/master@{#383772}

content/browser/BUILD.gn

@@ -201,8 +201,6 @@ source_set("browser") {
       sources += [
         "media/capture/desktop_capture_device.cc",
         "media/capture/desktop_capture_device.h",
-        "media/capture/desktop_capture_device_uma_types.cc",
-        "media/capture/desktop_capture_device_uma_types.h",
       ]
       if (use_aura) {
         sources += [

content/browser/media/capture/desktop_capture_device_uma_types.h

@@ -17,6 +17,9 @@ enum DesktopCaptureCounters {
   FIRST_SCREEN_CAPTURE_FAILED,
   FIRST_WINDOW_CAPTURE_SUCCEEDED,
   FIRST_WINDOW_CAPTURE_FAILED,
+  TAB_VIDEO_CAPTURER_CREATED,
+  TAB_AUDIO_CAPTURER_CREATED,
+  SYSTEM_LOOPBACK_AUDIO_CAPTURER_CREATED,
   DESKTOP_CAPTURE_COUNTER_BOUNDARY
 };
 

content/browser/renderer_host/media/audio_input_renderer_host.cc

@@ -16,6 +16,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "build/build_config.h"
+#include "content/browser/media/capture/desktop_capture_device_uma_types.h"
 #include "content/browser/media/capture/web_contents_audio_input_stream.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/media/webrtc/webrtc_internals.h"
@@ -382,6 +383,7 @@ void AudioInputRendererHost::DoCreateStream(
     audio_params.set_format(media::AudioParameters::AUDIO_FAKE);
 
   // Check if we have the permission to open the device and which device to use.
+  MediaStreamType type = MEDIA_NO_SERVICE;
   std::string device_name;
   std::string device_id = media::AudioManagerBase::kDefaultDeviceId;
   if (audio_params.format() != media::AudioParameters::AUDIO_FAKE) {
@@ -394,7 +396,7 @@ void AudioInputRendererHost::DoCreateStream(
       MaybeUnregisterKeyboardMicStream(config);
       return;
     }
-
+    type = info->device.type;
     device_id = info->device.id;
     device_name = info->device.name;
     oss << ": device_name=" << device_name;
@@ -444,6 +446,9 @@ void AudioInputRendererHost::DoCreateStream(
             audio_mirroring_manager_),
         entry->writer.get(),
         user_input_monitor_);
+    // Only count for captures from desktop media picker dialog.
+    if (entry->controller.get() && type == MEDIA_DESKTOP_AUDIO_CAPTURE)
+      IncrementDesktopCaptureCounter(TAB_AUDIO_CAPTURER_CREATED);
   } else {
     // We call CreateLowLatency regardless of the value of
     // |audio_params.format|. Low latency can currently mean different things in
@@ -459,6 +464,13 @@ void AudioInputRendererHost::DoCreateStream(
         user_input_monitor_,
         config.automatic_gain_control);
     oss << ", AGC=" << config.automatic_gain_control;
+
+    // Only count for captures from desktop media picker dialog and system loop
+    // back audio.
+    if (entry->controller.get() && type == MEDIA_DESKTOP_AUDIO_CAPTURE &&
+        device_id == media::AudioManagerBase::kLoopbackInputDeviceId) {
+      IncrementDesktopCaptureCounter(SYSTEM_LOOPBACK_AUDIO_CAPTURER_CREATED);
+    }
   }
 
   if (!entry->controller.get()) {

content/browser/renderer_host/media/video_capture_manager.cc

@@ -21,6 +21,7 @@
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "build/build_config.h"
+#include "content/browser/media/capture/desktop_capture_device_uma_types.h"
 #include "content/browser/media/capture/web_contents_video_capture_device.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/renderer_host/media/video_capture_controller.h"
@@ -524,6 +525,7 @@ VideoCaptureManager::DoStartDesktopCaptureOnDeviceThread(
 
   if (desktop_id.type == DesktopMediaID::TYPE_WEB_CONTENTS) {
     video_capture_device.reset(WebContentsVideoCaptureDevice::Create(id));
+    IncrementDesktopCaptureCounter(TAB_VIDEO_CAPTURER_CREATED);
   } else {
 #if defined(USE_AURA)
     video_capture_device = DesktopCaptureDeviceAura::Create(desktop_id);

content/content_browser.gypi

@@ -1059,6 +1059,8 @@
       'browser/media/capture/cursor_renderer_aura.h',
       'browser/media/capture/cursor_renderer_mac.mm',
       'browser/media/capture/cursor_renderer_mac.h',
+      'browser/media/capture/desktop_capture_device_uma_types.cc',
+      'browser/media/capture/desktop_capture_device_uma_types.h',
       'browser/media/capture/web_contents_audio_input_stream.cc',
       'browser/media/capture/web_contents_audio_input_stream.h',
       'browser/media/capture/web_contents_audio_muter.cc',
@@ -1965,8 +1967,6 @@
       'sources': [
         'browser/media/capture/desktop_capture_device.cc',
         'browser/media/capture/desktop_capture_device.h',
-        'browser/media/capture/desktop_capture_device_uma_types.cc',
-        'browser/media/capture/desktop_capture_device_uma_types.h',
       ],
       'dependencies': [
         '../third_party/webrtc/modules/modules.gyp:desktop_capture',

tools/metrics/histograms/histograms.xml

@@ -63396,6 +63396,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="3" label="First screen capture call failed."/>
   <int value="4" label="First window capture call succeeded."/>
   <int value="5" label="First window capture call failed."/>
+  <int value="6" label="Tab video capturer created."/>
+  <int value="7" label="Tab audio capturer created."/>
+  <int value="8" label="System loopback audio capturer created."/>
 </enum>
 
 <enum name="DesktopSearchRedirectionInfobarCloseAction" type="int">