Add UMA to study the video types for mobile

content/browser/media/android/browser_media_player_manager.cc

Index: content/browser/media/android/browser_media_player_manager.cc
diff --git a/content/browser/media/android/browser_media_player_manager.cc b/content/browser/media/android/browser_media_player_manager.cc
index c847a275b8f37d484775164dd90079ab69a135e7..b2dca8732ceba1ca3be79eddc671f6417a10c8ea 100644
--- a/content/browser/media/android/browser_media_player_manager.cc
+++ b/content/browser/media/android/browser_media_player_manager.cc
@@ -6,6 +6,7 @@
 
 #include "base/android/scoped_java_ref.h"
 #include "base/command_line.h"
+#include "base/metrics/histogram.h"
 #include "content/browser/android/content_view_core_impl.h"
 #include "content/browser/media/android/browser_demuxer_android.h"
 #include "content/browser/media/android/media_resource_getter_impl.h"
@@ -40,9 +41,17 @@ namespace content {
 // attempting to release inactive media players.
 const int kMediaPlayerThreshold = 1;
 
+// Number of media types to be recorded.
+const int kMaxMediaTypes = 2;
+
 static BrowserMediaPlayerManager::Factory g_factory = NULL;
 static media::MediaUrlInterceptor* media_url_interceptor_ = NULL;
 
+void RecordMobileMediaType(bool is_media_url) {
+  UMA_HISTOGRAM_ENUMERATION("Media.Mobile.MediaType",

[Ilya Sherman, 2014/08/27 00:31:27]

Why not use UMA_HISTOGRAM_BOOLEAN?

[qinmin, 2014/08/27 17:29:38]

Done.

+                            is_media_url ? 0 : 1, kMaxMediaTypes);
+}
+
 // static
 void BrowserMediaPlayerManager::RegisterFactory(Factory factory) {
   g_factory = factory;
@@ -103,10 +112,17 @@ MediaPlayerAndroid* BrowserMediaPlayerManager::CreateMediaPlayer(
             media_player_params.url)) {
         media_player_bridge->Initialize();
       }
+      std::string path = media_player_params.url.path();
+      bool is_hls_media = EndsWith(path, ".m3u8", true) ||
+          EndsWith(path, ".m3u", true);
+      UMA_HISTOGRAM_BOOLEAN("Media.Mobile.IsHttpLiveStreamingMedia",
+                            is_hls_media);
+      RecordMobileMediaType(true);
       return media_player_bridge;
     }
 
     case MEDIA_PLAYER_TYPE_MEDIA_SOURCE: {
+      RecordMobileMediaType(false);
       return new MediaSourcePlayer(
           media_player_params.player_id,
           manager,