"Load image" context menu item to reload a LoFi image.

chrome/renderer/chrome_render_frame_observer.cc

 // Copyright 2013 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 "chrome/renderer/chrome_render_frame_observer.h"
 
 #include <limits>
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/prerender_messages.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/prerender/prerender_helper.h"
 #include "components/printing/common/print_messages.h"
 #include "components/printing/renderer/print_web_view_helper.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_view.h"
 #include "net/base/net_util.h"
 #include "skia/ext/image_operations.h"
 #include "third_party/WebKit/public/platform/WebImage.h"
 #include "third_party/WebKit/public/platform/modules/app_banner/WebAppBannerPromptReply.h"
 #include "third_party/WebKit/public/web/WebDataSource.h"
 #include "third_party/WebKit/public/web/WebElement.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebNode.h"
+#include "third_party/WebKit/public/web/WebView.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/codec/jpeg_codec.h"
 
 using blink::WebDataSource;
 using blink::WebElement;
 using blink::WebNode;
 using content::SSLStatus;
 
 namespace {
 
@@ skipping 47 matching lines @@
   // Filter only.
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ChromeRenderFrameObserver, message)
     IPC_MESSAGE_HANDLER(PrerenderMsg_SetIsPrerendering, OnSetIsPrerendering)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   if (handled)
     return false;
 
   IPC_BEGIN_MESSAGE_MAP(ChromeRenderFrameObserver, message)
+    IPC_MESSAGE_HANDLER(ChromeViewMsg_RequestReloadImageForContextNode,
+                        OnRequestReloadImageForContextNode)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_RequestThumbnailForContextNode,
                         OnRequestThumbnailForContextNode)
     IPC_MESSAGE_HANDLER(PrintMsg_PrintNodeUnderContextMenu,
                         OnPrintNodeUnderContextMenu)
     IPC_MESSAGE_HANDLER(ChromeViewMsg_AppBannerPromptRequest,
                         OnAppBannerPromptRequest)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void ChromeRenderFrameObserver::OnSetIsPrerendering(bool is_prerendering) {
   if (is_prerendering) {
     // If the PrerenderHelper for this frame already exists, don't create it. It
     // can already be created for subframes during handling of
     // RenderFrameCreated, if the parent frame was prerendering at time of
     // subframe creation.
     if (prerender::PrerenderHelper::Get(render_frame()))
       return;
 
     // The PrerenderHelper will destroy itself either after recording histograms
     // or on destruction of the RenderView.
     new prerender::PrerenderHelper(render_frame());
   }
 }
 
+void ChromeRenderFrameObserver::OnRequestReloadImageForContextNode() {
+  WebNode context_node = render_frame()->GetContextMenuNode();
+  if (!context_node.isNull() && context_node.isElementNode() &&
+      render_frame()->GetWebFrame()) {
+    render_frame()->GetWebFrame()->reloadImage(context_node);
+  }
+}
+
 void ChromeRenderFrameObserver::OnRequestThumbnailForContextNode(
     int thumbnail_min_area_pixels,
     const gfx::Size& thumbnail_max_size_pixels) {
   WebNode context_node = render_frame()->GetContextMenuNode();
   SkBitmap thumbnail;
   gfx::Size original_size;
   if (!context_node.isNull() && context_node.isElementNode()) {
     blink::WebImage image = context_node.to<WebElement>().imageContents();
     original_size = image.size();
     thumbnail = Downscale(image,
@@ skipping 64 matching lines @@
     int request_id, const std::string& platform) {
   blink::WebAppBannerPromptReply reply = blink::WebAppBannerPromptReply::None;
   blink::WebString web_platform(base::UTF8ToUTF16(platform));
   blink::WebVector<blink::WebString> web_platforms(&web_platform, 1);
   render_frame()->GetWebFrame()->willShowInstallBannerPrompt(
       web_platforms, &reply);
 
   Send(new ChromeViewHostMsg_AppBannerPromptReply(
       routing_id(), request_id, reply));
 }