Implemented rest of webkit api/glue code needed for HTML5 media canPlayType().

net/base/mime_util.cc

Index: net/base/mime_util.cc
diff --git a/net/base/mime_util.cc b/net/base/mime_util.cc
index 4cbb94dc6b487941eac2feb73f7c3660d74a2577..24119c5f13dc7044d21fe8943dbd1d504ec47617 100644
--- a/net/base/mime_util.cc
+++ b/net/base/mime_util.cc
@@ -37,6 +37,8 @@ class MimeUtil : public PlatformMimeUtil {
   bool MatchesMimeType(const std::string &mime_type_pattern,
                        const std::string &mime_type) const;
 
+  bool AreSupportedMediaCodecs(const std::vector<std::string>& codecs) const;
+
   void ParseCodecString(const std::string& codecs,
                         std::vector<std::string>* codecs_out);
 
@@ -55,6 +57,7 @@ class MimeUtil : public PlatformMimeUtil {
   MimeMappings non_image_map_;
   MimeMappings javascript_map_;
   MimeMappings view_source_map_;
+  MimeMappings codecs_map_;
 };  // class MimeUtil
 
 struct MimeInfo {
@@ -203,6 +206,19 @@ static const char* const supported_media_types[] = {
   "video/mpeg"
 };
 
+// List of supported codecs when passed in with <source type="...">.
+//
+// Refer to http://wiki.whatwg.org/wiki/Video_type_parameters#Browser_Support
+// for more information.
+static const char* const supported_media_codecs[] = {
+#if defined(GOOGLE_CHROME_BUILD)
+  "avc1",
+  "mp4a",
+#endif
+  "theora",
+  "vorbis",
+};
+
 // Note: does not include javascript types list (see supported_javascript_types)
 static const char* const supported_non_image_types[] = {
   "text/html",
@@ -277,6 +293,9 @@ void MimeUtil::InitializeMimeTypeMaps() {
 
   for (size_t i = 0; i < arraysize(view_source_types); ++i)
     view_source_map_.insert(view_source_types[i]);
+
+  for (size_t i = 0; i < arraysize(supported_media_codecs); ++i)
+    codecs_map_.insert(supported_media_codecs[i]);
 }
 
 bool MimeUtil::IsSupportedImageMimeType(const char* mime_type) const {
@@ -343,6 +362,16 @@ bool MimeUtil::MatchesMimeType(const std::string &mime_type_pattern,
   return true;
 }
 
+bool MimeUtil::AreSupportedMediaCodecs(
+    const std::vector<std::string>& codecs) const {
+  for (size_t i = 0; i < codecs.size(); ++i) {
+    if (codecs_map_.find(codecs[i]) == codecs_map_.end()) {
+      return false;
+    }
+  }
+  return true;
+}
+
 void MimeUtil::ParseCodecString(const std::string& codecs,
                                 std::vector<std::string>* codecs_out) {
   std::string no_quote_codecs;
@@ -410,6 +439,10 @@ bool MatchesMimeType(const std::string &mime_type_pattern,
   return GetMimeUtil()->MatchesMimeType(mime_type_pattern, mime_type);
 }
 
+bool AreSupportedMediaCodecs(const std::vector<std::string>& codecs) {
+  return GetMimeUtil()->AreSupportedMediaCodecs(codecs);
+}
+
 void ParseCodecString(const std::string& codecs,
                       std::vector<std::string>* codecs_out) {
   GetMimeUtil()->ParseCodecString(codecs, codecs_out);