Remove old version navigator content utils APIs

Old version navigator content utils APIs have been kept since r165458. Because
blink bots might ignore dependency with new content module. However, blink bots
is using updated content module which supports new navigator content utils APIs. Thus,
this cl removes the old navigator content utils APIs.

Review URL: https://codereview.chromium.org/232263003

git-svn-id: svn://svn.chromium.org/blink/trunk@171454 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/public/web/WebViewClient.h

@@ -288,32 +288,13 @@ public:
     virtual void registerProtocolHandler(const WebString& scheme,
         const WebURL& baseUrl,
         const WebURL& url,
-        const WebString& title)
-    {
-        registerProtocolHandler(scheme, baseUrl.string(), url.string(), title);
-    }
+        const WebString& title) { }
 
     // Unregisters a given URL handler for the given protocol.
-    virtual void unregisterProtocolHandler(const WebString& scheme, const WebURL& baseUrl, const WebURL& url)
-    {
-        unregisterProtocolHandler(scheme, baseUrl.string(), url.string());
-    }
+    virtual void unregisterProtocolHandler(const WebString& scheme, const WebURL& baseUrl, const WebURL& url) { }
 
     // Check if a given URL handler is registered for the given protocol.
     virtual WebCustomHandlersState isProtocolHandlerRegistered(const WebString& scheme, const WebURL& baseUrl, const WebURL& url)
-    {
-        return isProtocolHandlerRegistered(scheme, baseUrl.string(), url.string());
-    }
-
-    // These old version APIs need to be removed after synching with chrome side.
-    virtual void registerProtocolHandler(const WebString& scheme,
-        const WebString& baseUrl,
-        const WebString& url,
-        const WebString& title) { }
-
-    virtual void unregisterProtocolHandler(const WebString& scheme, const WebString& baseUrl, const WebString& url) { }
-
-    virtual WebCustomHandlersState isProtocolHandlerRegistered(const WebString& scheme, const WebString& baseUrl, const WebString& url)
     {
         return WebCustomHandlersNew;
     }