Only generate suggested filenames when actually dragging an image.

third_party/WebKit/Source/core/loader/ProgressTrackerTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/loader/ProgressTracker.h"
 
 #include "core/frame/Settings.h"
 #include "core/loader/EmptyClients.h"
 #include "core/testing/DummyPageHolder.h"
 #include "platform/network/ResourceResponse.h"
@@ skipping 14 matching lines @@
  private:
   double m_lastProgress;
 };
 
 class ProgressTrackerTest : public ::testing::Test {
  public:
   ProgressTrackerTest()
       : m_response(KURL(ParsedURLString, "http://example.com"),
                    "text/html",
                    1024,
-                   nullAtom,
-                   String()) {}
+                   nullAtom) {}
 
   void SetUp() override {
     m_client = new ProgressClient;
     m_dummyPageHolder =
         DummyPageHolder::create(IntSize(800, 600), nullptr, m_client.get());
     frame().settings()->setProgressBarCompletion(
         ProgressBarCompletion::ResourcesBeforeDCL);
   }
 
   LocalFrame& frame() const { return m_dummyPageHolder->frame(); }
@@ skipping 70 matching lines @@
   // .2 for finishing parsing, .5 for all bytes received.
   // Medium priority resource is ignored.
   progress().completeProgress(1ul);
   EXPECT_EQ(0.7, lastProgress());
 
   progress().finishedParsing();
   EXPECT_EQ(1.0, lastProgress());
 }
 
 }  // namespace blink