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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "extensions/renderer/scripts_run_info.h"
      6 
      7 #include "base/metrics/histogram.h"
      8 #include "content/public/renderer/render_view.h"
      9 #include "extensions/common/extension_messages.h"
     10 #include "extensions/renderer/script_context.h"
     11 #include "third_party/WebKit/public/web/WebFrame.h"
     12 
     13 namespace extensions {
     14 
     15 ScriptsRunInfo::ScriptsRunInfo() : num_css(0u), num_js(0u) {
     16 }
     17 
     18 ScriptsRunInfo::~ScriptsRunInfo() {
     19 }
     20 
     21 void ScriptsRunInfo::LogRun(blink::WebFrame* frame,
     22                             UserScript::RunLocation location) {
     23   // Notify the browser if any extensions are now executing scripts.
     24   if (!executing_scripts.empty()) {
     25     content::RenderView* render_view =
     26         content::RenderView::FromWebView(frame->view());
     27     render_view->Send(new ExtensionHostMsg_ContentScriptsExecuting(
     28         render_view->GetRoutingID(),
     29         executing_scripts,
     30         ScriptContext::GetDataSourceURLForFrame(frame)));
     31   }
     32 
     33   switch (location) {
     34     case UserScript::DOCUMENT_START:
     35       UMA_HISTOGRAM_COUNTS_100("Extensions.InjectStart_CssCount", num_css);
     36       UMA_HISTOGRAM_COUNTS_100("Extensions.InjectStart_ScriptCount", num_js);
     37       if (num_css || num_js)
     38         UMA_HISTOGRAM_TIMES("Extensions.InjectStart_Time", timer.Elapsed());
     39       break;
     40     case UserScript::DOCUMENT_END:
     41       UMA_HISTOGRAM_COUNTS_100("Extensions.InjectEnd_ScriptCount", num_js);
     42       if (num_js)
     43         UMA_HISTOGRAM_TIMES("Extensions.InjectEnd_Time", timer.Elapsed());
     44       break;
     45     case UserScript::DOCUMENT_IDLE:
     46       UMA_HISTOGRAM_COUNTS_100("Extensions.InjectIdle_ScriptCount", num_js);
     47       if (num_js)
     48         UMA_HISTOGRAM_TIMES("Extensions.InjectIdle_Time", timer.Elapsed());
     49       break;
     50     case UserScript::RUN_DEFERRED:
     51     case UserScript::BROWSER_DRIVEN:
     52       // TODO(rdevlin.cronin): Add histograms.
     53       break;
     54     case UserScript::UNDEFINED:
     55     case UserScript::RUN_LOCATION_LAST:
     56       NOTREACHED();
     57   }
     58 }
     59 
     60 }  // namespace extensions
     61