Add mime_type_handler key to extension manifests.

This specifies the viewer that will be used to render documents that are
a supported MIME type for the extension.

BUG=366409

Review URL: https://codereview.chromium.org/254503002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266821 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/api/_manifest_features.json

@@ -213,6 +213,18 @@
       "mhjfbmdgcfjbbpaeojofohoefgiehjai"   // PDF
     ]
   },
+  "mime_types_handler": {
+    "channel": "stable",
+    "extension_types": [ "extension", "legacy_packaged_app", "platform_app" ],
+    "whitelist": [
+      "oickdpebdnfbgkcaoklfcdhjniefkcji",  // browser_tests
+      "gbkeegbaiigmenfmjfclcdgdpimamgkj",  // QuickOffice
+      "ionpfmkccalenbmnddpbmocokhaknphg",  // QuickOffice Dev
+      "bpmcpldpdmajfigpchkicefoigmkfalc",  // Quickoffice component extension
+      "ehibbfinohgbchlgdbfpikodjaojhccn",  // Editor
+      "mhjfbmdgcfjbbpaeojofohoefgiehjai"   // PDF
+    ]
+  },
   "minimum_chrome_version": {
     "channel": "stable",
     "extension_types": [

chrome/common/extensions/mime_types_handler.cc

@@ -99,10 +99,19 @@ bool MimeTypesHandlerParser::Parse(extensions::Extension* extension,
     info->handler_.AddMIMEType(filter);
   }
 
+  std::string mime_types_handler;
+  if (extension->manifest()->GetString(keys::kMimeTypesHandler,
+                                       &mime_types_handler)) {
+    info->handler_.set_handler_url(mime_types_handler);
+  }
+
   extension->SetManifestData(keys::kMimeTypesHandler, info.release());
   return true;
 }
 
 const std::vector<std::string> MimeTypesHandlerParser::Keys() const {
-  return SingleKey(keys::kMIMETypes);
+  std::vector<std::string> keys;
+  keys.push_back(keys::kMIMETypes);
+  keys.push_back(keys::kMimeTypesHandler);
+  return keys;
 }

chrome/common/extensions/mime_types_handler.h

@@ -34,6 +34,13 @@ class MimeTypesHandler {
   // Tests if the handler has registered a filter for the MIME type.
   bool CanHandleMIMEType(const std::string& mime_type) const;
 
+  // Set the URL that will be used to handle MIME type requests.
+  void set_handler_url(const std::string& handler_url) {
+    handler_url_ = handler_url;
+  }
+  // The URL that will be used to handle MIME type requests.
+  const std::string handler_url() const { return handler_url_; }
+
  private:
   // The id for the extension this action belongs to (as defined in the
   // extension manifest).
@@ -41,6 +48,8 @@ class MimeTypesHandler {
 
   // A list of MIME type filters.
   std::set<std::string> mime_type_set_;
+
+  std::string handler_url_;
 };
 
 class MimeTypesHandlerParser : public extensions::ManifestHandler {