Replace image_messages.h with Mojo service

content/test/test_web_contents.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_TEST_TEST_WEB_CONTENTS_H_
 #define CONTENT_TEST_TEST_WEB_CONTENTS_H_
 
 #include <string>
 
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 17 matching lines @@
 class TestWebContents : public WebContentsImpl, public WebContentsTester {
  public:
   ~TestWebContents() override;
 
   static TestWebContents* Create(BrowserContext* browser_context,
                                  SiteInstance* instance);
 
   // WebContentsImpl overrides (returning the same values, but in Test* types)
   TestRenderFrameHost* GetMainFrame() override;
   TestRenderViewHost* GetRenderViewHost() const override;
+  // Overrides to avoid establishing Mojo connection with renderer process.
+  int DownloadImage(const GURL& url,
+                    bool is_favicon,
+                    uint32_t max_bitmap_size,
+                    bool bypass_cache,
+                    const ImageDownloadCallback& callback) override;
 
   // WebContentsTester implementation.
   void CommitPendingNavigation() override;
   TestRenderFrameHost* GetPendingMainFrame() const override;
   void NavigateAndCommit(const GURL& url) override;
   void TestSetIsLoading(bool value) override;
   void ProceedWithCrossSiteNavigation() override;
   void TestDidNavigate(RenderFrameHost* render_frame_host,
                        int page_id,
                        int nav_entry_id,
@@ skipping 86 matching lines @@
   // Expectations for arguments of |SetHistoryOffsetAndLength()|.
   bool expect_set_history_offset_and_length_;
   int expect_set_history_offset_and_length_history_offset_;
   int expect_set_history_offset_and_length_history_length_;
   std::string save_frame_headers_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_TEST_WEB_CONTENTS_H_