Remove the url parameter from blink::Platform::userAgent since it's not used anymore.

BUG=304341

Review URL: https://codereview.chromium.org/208923002

git-svn-id: svn://svn.chromium.org/blink/trunk@169863 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp

@@ -593,7 +593,7 @@ String FrameLoaderClientImpl::userAgent(const KURL& url)
     if (!override.isEmpty())
         return override;
 
-    return blink::Platform::current()->userAgent(url);
+    return blink::Platform::current()->userAgent();
 }
 
 String FrameLoaderClientImpl::doNotTrackValue()

third_party/WebKit/public/platform/Platform.h

@@ -323,8 +323,8 @@ public:
     // Returns a new WebSocketHandle instance.
     virtual WebSocketHandle* createWebSocketHandle() { return 0; }
 
-    // Returns the User-Agent string that should be used for the given URL.
-    virtual WebString userAgent(const WebURL&) { return WebString(); }
+    // Returns the User-Agent string.
+    virtual WebString userAgent() { return WebString(); }
 
     // A suggestion to cache this metadata in association with this URL.
     virtual void cacheMetadata(const WebURL&, double responseTime, const char* data, size_t dataSize) { }