DevTools: request page thumbnails from the devtools handler delegate, do not redirect to chrome://t…

chrome/browser/debugger/browser_list_tabcontents_provider.cc

 // 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.
 
 #include "chrome/browser/debugger/browser_list_tabcontents_provider.h"
 
 #include "chrome/browser/history/top_sites.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "content/public/browser/browser_thread.h"
 #include "grit/devtools_discovery_page_resources.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 
 using content::DevToolsHttpHandlerDelegate;
 
@@ skipping 29 matching lines @@
 
 bool BrowserListTabContentsProvider::BundlesFrontendResources() {
   // We'd like front-end to be served from the WebUI via proxy, hence
   // pretend we don't have it bundled.
   return false;
 }
 
 std::string BrowserListTabContentsProvider::GetFrontendResourcesBaseURL() {
   return "chrome-devtools://devtools/";
 }
+
+std::string BrowserListTabContentsProvider::GetPageThumbnailData(
+    const GURL& url) {
+  for (BrowserList::const_iterator it = BrowserList::begin(),
+       end = BrowserList::end(); it != end; ++it) {
+    Profile* profile = (*it)->profile();
+    history::TopSites* top_sites = profile->GetTopSites();
+    if (!top_sites)
+      continue;
+    scoped_refptr<base::RefCountedMemory> data;
+    if (top_sites->GetPageThumbnail(url, &data))
+      return std::string(
+          reinterpret_cast<const char*>(data->front()), data->size());
+  }
+
+  return std::string();
+}