Implement declarative content script API for <webview> [js part].

extensions/browser/api/declarative/declarative_api.cc

Index: extensions/browser/api/declarative/declarative_api.cc
diff --git a/extensions/browser/api/declarative/declarative_api.cc b/extensions/browser/api/declarative/declarative_api.cc
index b786fcb0c0733177b3131a6366bdea8d739f26ac..381c736297d62b2c2d2dbc8c715fe23a49c98d48 100644
--- a/extensions/browser/api/declarative/declarative_api.cc
+++ b/extensions/browser/api/declarative/declarative_api.cc
@@ -34,6 +34,7 @@ namespace extensions {
 namespace {
 
 const char kWebRequest[] = "declarativeWebRequest.";
+const char kDeclarativeContent[] = "declarativeContent.";
 const char kWebViewExpectedError[] = "Webview event with Webview ID expected.";
 
 bool IsWebViewEvent(const std::string& event_name) {
@@ -48,8 +49,13 @@ bool IsWebViewEvent(const std::string& event_name) {
 std::string GetWebRequestEventName(const std::string& event_name) {
   std::string web_request_event_name(event_name);
   if (IsWebViewEvent(web_request_event_name)) {
-    web_request_event_name.replace(
-        0, strlen(webview::kWebViewEventPrefix), kWebRequest);
+    if (web_request_event_name.find(kDeclarativeContent) == std::string::npos) {
+      web_request_event_name.replace(
+          0, strlen(webview::kWebViewEventPrefix), kWebRequest);
+    } else {
+      web_request_event_name.replace(
+          0, strlen(webview::kWebViewEventPrefix), "");
+    }
   }
   return web_request_event_name;
 }