Remove mutableResourceRequest() by FetchRequest::setRequestContext()

third_party/WebKit/Source/platform/loader/fetch/FetchRequest.h

Index: third_party/WebKit/Source/platform/loader/fetch/FetchRequest.h
diff --git a/third_party/WebKit/Source/platform/loader/fetch/FetchRequest.h b/third_party/WebKit/Source/platform/loader/fetch/FetchRequest.h
index 44f7213d7b4d5339603f82ab68f80c49bafce83f..7389bfcb677b91a21c62c22f9c424bc48ce247d9 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/FetchRequest.h
+++ b/third_party/WebKit/Source/platform/loader/fetch/FetchRequest.h
@@ -81,6 +81,10 @@ class PLATFORM_EXPORT FetchRequest {
   const ResourceRequest& resourceRequest() const { return m_resourceRequest; }
   const KURL& url() const { return m_resourceRequest.url(); }
 
+  void setRequestContext(WebURLRequest::RequestContext context) {
+    m_resourceRequest.setRequestContext(context);
+  }
+
   const String& charset() const { return m_charset; }
   void setCharset(const String& charset) { m_charset = charset; }