Implement MediaMetadata artwork in content

content/renderer/media/android/webmediasession_android.cc

Index: content/renderer/media/android/webmediasession_android.cc
diff --git a/content/renderer/media/android/webmediasession_android.cc b/content/renderer/media/android/webmediasession_android.cc
index c1a936d1e25c6b70a24dd21cf26fdc57c03a66dd..9ad67455385edb7e4b888d0fc408ae8054dee4b8 100644
--- a/content/renderer/media/android/webmediasession_android.cc
+++ b/content/renderer/media/android/webmediasession_android.cc
@@ -4,12 +4,15 @@
 
 #include "content/renderer/media/android/webmediasession_android.h"
 
+#include <iterator>
 #include <memory>
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "content/public/common/media_metadata.h"
 #include "content/renderer/media/android/renderer_media_session_manager.h"
+#include "third_party/WebKit/public/platform/WebIconSizesParser.h"
+#include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/public/platform/modules/mediasession/WebMediaMetadata.h"
 
 namespace content {
@@ -42,6 +45,16 @@ void WebMediaSessionAndroid::setMetadata(
     metadata.title = web_metadata->title;
     metadata.artist = web_metadata->artist;
     metadata.album = web_metadata->album;
+    for (const auto& web_artwork : web_metadata->artwork) {
+      MediaMetadata::Artwork artwork;
+      artwork.src = GURL(base::string16(web_artwork.src));
+      artwork.type = web_artwork.type;
+      blink::WebVector<blink::WebSize> web_sizes =
+          blink::WebIconSizesParser::parseIconSizes(web_artwork.sizes);
+      std::copy(web_sizes.begin(), web_sizes.end(),
+                std::back_inserter(artwork.sizes));

[dcheng, 2016/07/05 02:36:55]

It's probably a bit more common to see this written as:
  artwork.sizes.insert(artwork.sizes.end(), web_sizes.begin(), web_sizes.end());

Otherwise, you actually need to include two headers (iterator and algorithm)

[Zhiqiang Zhang (Slow), 2016/07/05 15:30:30]

Done.

+      metadata.artwork.push_back(artwork);
+    }
   }
 
   session_manager_->SetMetadata(media_session_id_, metadata);