media: Report frame info to EME rMKSA() UKM

This CL adds IsCrossOrigin, IsTopFrame and IsAdFrame info to
Media.EME.RequestMediaKeySystemAccess UKM.

Bug: 1068642
Change-Id: I103e1fdd11f0a01868b21d2f8a4d9340ac4e1a49
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2139994
Commit-Queue: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: John Rummell <jrummell@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#757653}

third_party/blink/renderer/modules/encryptedmedia/media_key_system_access_initializer_base.cc

@@ -10,6 +10,7 @@
 #include "services/metrics/public/cpp/ukm_recorder.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_media_key_system_media_capability.h"
 #include "third_party/blink/renderer/core/dom/document.h"
+#include "third_party/blink/renderer/core/frame/local_frame.h"
 #include "third_party/blink/renderer/core/inspector/console_message.h"
 #include "third_party/blink/renderer/modules/encryptedmedia/encrypted_media_utils.h"
 #include "third_party/blink/renderer/platform/heap/heap.h"
@@ -133,7 +134,7 @@ MediaKeySystemAccessInitializerBase::MediaKeySystemAccessInitializerBase(
     supported_configurations_[i] = web_config;
   }
 
-  CheckVideoCapabilityRobustness();
+  GenerateWarningAndReportMetrics();
 }
 
 const SecurityOrigin* MediaKeySystemAccessInitializerBase::GetSecurityOrigin()
@@ -160,7 +161,7 @@ bool MediaKeySystemAccessInitializerBase::IsExecutionContextValid() const {
   return context && !context->IsContextDestroyed();
 }
 
-void MediaKeySystemAccessInitializerBase::CheckVideoCapabilityRobustness()
+void MediaKeySystemAccessInitializerBase::GenerateWarningAndReportMetrics()
     const {
   const char kWidevineKeySystem[] = "com.widevine.alpha";
   const char kWidevineHwSecureAllRobustness[] = "HW_SECURE_ALL";
@@ -219,13 +220,18 @@ void MediaKeySystemAccessInitializerBase::CheckVideoCapabilityRobustness()
   if (!IsExecutionContextValid())
     return;
 
-  Document* document = Document::From(GetExecutionContext());
-  if (!document)
+  Document* document = GetDocument();
+  LocalFrame* frame = GetFrame();
+  if (!document || !frame)
     return;
 
   ukm::builders::Media_EME_RequestMediaKeySystemAccess builder(
       document->UkmSourceID());
   builder.SetKeySystem(KeySystemForUkm::kWidevine);
+  builder.SetIsAdFrame(
+      static_cast<int>(frame->IsAdRoot() || frame->IsAdSubframe()));
+  builder.SetIsCrossOrigin(static_cast<int>(frame->IsCrossOriginToMainFrame()));
+  builder.SetIsTopFrame(static_cast<int>(frame->IsMainFrame()));
   builder.SetVideoCapabilities(static_cast<int>(has_video_capabilities));
   builder.SetVideoCapabilities_HasEmptyRobustness(
       static_cast<int>(has_empty_robustness));

third_party/blink/renderer/modules/encryptedmedia/media_key_system_access_initializer_base.h

@@ -47,10 +47,10 @@ class MediaKeySystemAccessInitializerBase : public EncryptedMediaRequest,
   // Returns true if the ExecutionContext is valid, false otherwise.
   bool IsExecutionContextValid() const;
 
-  // For widevine key system, generate warning and report to UMA if
-  // |m_supportedConfigurations| contains any video capability with empty
-  // robustness string.
-  void CheckVideoCapabilityRobustness() const;
+  // For widevine key system, generate warning if |supported_configurations_|
+  // contains any video capability with empty robustness string. Also report
+  // UMA and UKM.
+  void GenerateWarningAndReportMetrics() const;
 
   Member<ScriptPromiseResolver> resolver_;
   const String key_system_;

tools/metrics/ukm/ukm.xml

@@ -5375,6 +5375,21 @@ be describing additional metrics about the same event.
     Event recorded when RequestMediaKeySystemAccess() is called as part of
     Encrypted Media Extensions (EME) API.
   </summary>
+  <metric name="IsAdFrame">
+    <summary>
+      Whether the frame is an ad frame.
+    </summary>
+  </metric>
+  <metric name="IsCrossOrigin">
+    <summary>
+      Whether the frame is Cross-Origin to the main frame.
+    </summary>
+  </metric>
+  <metric name="IsTopFrame">
+    <summary>
+      Whether the frame is the main frame.
+    </summary>
+  </metric>
   <metric name="KeySystem">
     <summary>
       The key system passed in requestMediaKeySystemAccess() call.