Check whether the plugin is disabled in OnIsInternalPluginRegisteredForMimeType().

BUG=395294
TEST=Manually tested disabling the plugin and canPlayType() returns "".
R=ddorwin@chromium.org

Review URL: https://codereview.chromium.org/399063004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284753 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/plugins/plugin_info_message_filter.cc

@@ -62,6 +62,29 @@ bool ShouldUseJavaScriptSettingForPlugin(const WebPluginInfo& plugin) {
   return false;
 }
 
+#if defined(ENABLE_PEPPER_CDMS)
+
+enum PluginAvailabilityStatusForUMA {
+  PLUGIN_NOT_REGISTERED,
+  PLUGIN_AVAILABLE,
+  PLUGIN_DISABLED,
+  PLUGIN_AVAILABILITY_STATUS_MAX
+};
+
+static void SendPluginAvailabilityUMA(const std::string& mime_type,
+                                      PluginAvailabilityStatusForUMA status) {
+#if defined(WIDEVINE_CDM_AVAILABLE)
+  // Only report results for Widevine CDM.
+  if (mime_type != kWidevineCdmPluginMimeType)
+    return;
+
+  UMA_HISTOGRAM_ENUMERATION("Plugin.AvailabilityStatus.WidevineCdm",
+                            status, PLUGIN_AVAILABILITY_STATUS_MAX);
+#endif  // defined(WIDEVINE_CDM_AVAILABLE)
+}
+
+#endif  // defined(ENABLE_PEPPER_CDMS)
+
 }  // namespace
 
 PluginInfoMessageFilter::Context::Context(int render_process_id,
@@ -99,8 +122,8 @@ bool PluginInfoMessageFilter::OnMessageReceived(const IPC::Message& message) {
                                     OnGetPluginInfo)
 #if defined(ENABLE_PEPPER_CDMS)
     IPC_MESSAGE_HANDLER(
-        ChromeViewHostMsg_IsInternalPluginRegisteredForMimeType,
-        OnIsInternalPluginRegisteredForMimeType)
+        ChromeViewHostMsg_IsInternalPluginAvailableForMimeType,
+        OnIsInternalPluginAvailableForMimeType)
 #endif
     IPC_MESSAGE_UNHANDLED(return false)
   IPC_END_MESSAGE_MAP()
@@ -170,29 +193,42 @@ void PluginInfoMessageFilter::PluginsLoaded(
 }
 
 #if defined(ENABLE_PEPPER_CDMS)
-void PluginInfoMessageFilter::OnIsInternalPluginRegisteredForMimeType(
+
+void PluginInfoMessageFilter::OnIsInternalPluginAvailableForMimeType(
     const std::string& mime_type,
-    bool* is_registered,
+    bool* is_available,
     std::vector<base::string16>* additional_param_names,
     std::vector<base::string16>* additional_param_values) {
   std::vector<WebPluginInfo> plugins;
   PluginService::GetInstance()->GetInternalPlugins(&plugins);
+
+  bool is_plugin_disabled = false;
   for (size_t i = 0; i < plugins.size(); ++i) {
+    const WebPluginInfo& plugin = plugins[i];
     const std::vector<content::WebPluginMimeType>& mime_types =
-        plugins[i].mime_types;
+        plugin.mime_types;
     for (size_t j = 0; j < mime_types.size(); ++j) {
       if (mime_types[j].mime_type == mime_type) {
-        *is_registered = true;
+        if (!context_.IsPluginEnabled(plugin)) {
+          is_plugin_disabled = true;
+          break;
+        }
+
+        *is_available = true;
         *additional_param_names = mime_types[j].additional_param_names;
         *additional_param_values = mime_types[j].additional_param_values;
+        SendPluginAvailabilityUMA(mime_type, PLUGIN_AVAILABLE);
         return;
       }
     }
   }
 
-  *is_registered = false;
+  *is_available = false;
+  SendPluginAvailabilityUMA(
+      mime_type, is_plugin_disabled ? PLUGIN_DISABLED : PLUGIN_NOT_REGISTERED);
 }
-#endif
+
+#endif // defined(ENABLE_PEPPER_CDMS)
 
 void PluginInfoMessageFilter::Context::DecidePluginStatus(
     const GetPluginInfo_Params& params,
@@ -403,3 +439,7 @@ void PluginInfoMessageFilter::Context::MaybeGrantAccess(
   }
 }
 
+bool PluginInfoMessageFilter::Context::IsPluginEnabled(
+    const content::WebPluginInfo& plugin) const {
+  return plugin_prefs_->IsPluginEnabled(plugin);
+}

chrome/browser/plugins/plugin_info_message_filter.h

@@ -63,6 +63,7 @@ class PluginInfoMessageFilter : public content::BrowserMessageFilter {
                                  bool* is_managed) const;
     void MaybeGrantAccess(const ChromeViewHostMsg_GetPluginInfo_Status& status,
                           const base::FilePath& path) const;
+    bool IsPluginEnabled(const content::WebPluginInfo& plugin) const;
 
    private:
     int render_process_id_;
@@ -100,15 +101,16 @@ class PluginInfoMessageFilter : public content::BrowserMessageFilter {
                      const std::vector<content::WebPluginInfo>& plugins);
 
 #if defined(ENABLE_PEPPER_CDMS)
-  // Returns whether any internal plugin supporting |mime_type| is registered.
-  // Does not determine whether the plugin can actually be instantiated
-  // (e.g. whether it is allowed or has all its dependencies).
-  // When the returned *|is_registered| is true, |additional_param_names| and
+  // Returns whether any internal plugin supporting |mime_type| is registered
+  // and enabled. Does not determine whether the plugin can actually be
+  // instantiated (e.g. whether it has all its dependencies).
+  // When the returned *|is_available| is true, |additional_param_names| and
   // |additional_param_values| contain the name-value pairs, if any, specified
-  // for the *first* plugin found that is registered for |mime_type|.
-  void OnIsInternalPluginRegisteredForMimeType(
+  // for the *first* non-disabled plugin found that is registered for
+  // |mime_type|.
+  void OnIsInternalPluginAvailableForMimeType(
       const std::string& mime_type,
-      bool* is_registered,
+      bool* is_available,
       std::vector<base::string16>* additional_param_names,
       std::vector<base::string16>* additional_param_values);
 #endif

chrome/common/render_messages.h

@@ -430,16 +430,16 @@ IPC_SYNC_MESSAGE_CONTROL4_1(ChromeViewHostMsg_GetPluginInfo,
                             ChromeViewHostMsg_GetPluginInfo_Output /* output */)
 
 #if defined(ENABLE_PEPPER_CDMS)
-// Returns whether any internal plugin supporting |mime_type| is registered
-// Does not determine whether the plugin can actually be instantiated
-// (e.g. whether it is allowed or has all its dependencies).
-// When the returned *|is_registered| is true, |additional_param_names| and
+// Returns whether any internal plugin supporting |mime_type| is registered and
+// enabled. Does not determine whether the plugin can actually be instantiated
+// (e.g. whether it has all its dependencies).
+// When the returned *|is_available| is true, |additional_param_names| and
 // |additional_param_values| contain the name-value pairs, if any, specified
-// for the *first* plugin found that is registered for |mime_type|.
+// for the *first* non-disabled plugin found that is registered for |mime_type|.
 IPC_SYNC_MESSAGE_CONTROL1_3(
-    ChromeViewHostMsg_IsInternalPluginRegisteredForMimeType,
+    ChromeViewHostMsg_IsInternalPluginAvailableForMimeType,
     std::string /* mime_type */,
-    bool /* registered */,
+    bool /* is_available */,
     std::vector<base::string16> /* additional_param_names */,
     std::vector<base::string16> /* additional_param_values */)
 #endif

chrome/renderer/media/chrome_key_systems.cc

@@ -32,19 +32,19 @@ using content::KeySystemInfo;
 using content::SupportedCodecs;
 
 #if defined(ENABLE_PEPPER_CDMS)
-static bool IsPepperCdmRegistered(
+static bool IsPepperCdmAvailable(
     const std::string& pepper_type,
     std::vector<base::string16>* additional_param_names,
     std::vector<base::string16>* additional_param_values) {
-  bool is_registered = false;
+  bool is_available = false;
   content::RenderThread::Get()->Send(
-      new ChromeViewHostMsg_IsInternalPluginRegisteredForMimeType(
+      new ChromeViewHostMsg_IsInternalPluginAvailableForMimeType(
           pepper_type,
-          &is_registered,
+          &is_available,
           additional_param_names,
           additional_param_values));
 
-  return is_registered;
+  return is_available;
 }
 
 // External Clear Key (used for testing).
@@ -65,7 +65,7 @@ static void AddExternalClearKey(
 
   std::vector<base::string16> additional_param_names;
   std::vector<base::string16> additional_param_values;
-  if (!IsPepperCdmRegistered(kExternalClearKeyPepperType,
+  if (!IsPepperCdmAvailable(kExternalClearKeyPepperType,
                             &additional_param_names,
                             &additional_param_values)) {
     return;
@@ -141,7 +141,7 @@ static void AddPepperBasedWidevine(
 
   std::vector<base::string16> additional_param_names;
   std::vector<base::string16> additional_param_values;
-  if (!IsPepperCdmRegistered(kWidevineCdmPluginMimeType,
+  if (!IsPepperCdmAvailable(kWidevineCdmPluginMimeType,
                             &additional_param_names,
                             &additional_param_values)) {
     DVLOG(1) << "Widevine CDM is not currently available.";

tools/metrics/histograms/histograms.xml

@@ -22020,6 +22020,17 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Plugin.AvailabilityStatus.WidevineCdm"
+    enum="PluginAvailabilityStatus">
+  <owner>xhwang@chromium.org</owner>
+  <summary>
+    The availability status of Widevine CDM. In normal cases, this is reported
+    per render process if EME API is used. This is not reported if EME API is
+    not used. This could be reported multiple times per render process until
+    PLUGIN_AVAILABLE is reported (which should be a rare case).
+  </summary>
+</histogram>
+
 <histogram name="Plugin.FlashNavigateUsage" enum="FlashNavigateUsageType">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>Record usage of PPB_Flash.Navigate() Pepper API.</summary>
@@ -44578,6 +44589,12 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="16" label="I/O"/>
 </enum>
 
+<enum name="PluginAvailabilityStatus" type="int">
+  <int value="0" label="PLUGIN_NOT_REGISTERED"/>
+  <int value="1" label="PLUGIN_AVAILABLE"/>
+  <int value="2" label="PLUGIN_DISABLED"/>
+</enum>
+
 <enum name="PluginLoadResult" type="int">
   <int value="0" label="LOAD_SUCCESS"/>
   <int value="1" label="LOAD_FAILED"/>