Add the ability for DevTools to wrap network transactions.

content/browser/devtools/renderer_overrides_handler.cc

Index: content/browser/devtools/renderer_overrides_handler.cc
diff --git a/content/browser/devtools/renderer_overrides_handler.cc b/content/browser/devtools/renderer_overrides_handler.cc
index 1fd66da0607687ec7f5db3d6b05cb8ec8ac6daa1..df27ab3984bc20683a650c4779d43cfc7907f808 100644
--- a/content/browser/devtools/renderer_overrides_handler.cc
+++ b/content/browser/devtools/renderer_overrides_handler.cc
@@ -23,6 +23,7 @@
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/common/view_messages.h"
+#include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/devtools_agent_host.h"
@@ -32,6 +33,7 @@
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
+#include "content/public/browser/resource_context.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
@@ -103,6 +105,11 @@ RendererOverridesHandler::RendererOverridesHandler(DevToolsAgentHost* agent)
           &RendererOverridesHandler::ClearBrowserCookies,
           base::Unretained(this)));
   RegisterCommandHandler(
+      devtools::Network::emulateNetworkConditions::kName,
+      base::Bind(
+          &RendererOverridesHandler::EmulateNetworkConditions,
+          base::Unretained(this)));
+  RegisterCommandHandler(
       devtools::Page::disable::kName,
       base::Bind(
           &RendererOverridesHandler::PageDisable, base::Unretained(this)));
@@ -172,6 +179,7 @@ RendererOverridesHandler::~RendererOverridesHandler() {}
 
 void RendererOverridesHandler::OnClientDetached() {
   screencast_command_ = NULL;
+  UpdateNetworkState(false);
 }
 
 void RendererOverridesHandler::OnSwapCompositorFrame(
@@ -272,6 +280,15 @@ base::DictionaryValue* RendererOverridesHandler::CreateScreenshotResponse(
   return response;
 }
 
+void RendererOverridesHandler::UpdateNetworkState(bool offline) {
+  RenderViewHost* host = agent_->GetRenderViewHost();
+  if (!host)
+    return;
+  ResourceContext* context = host->GetSiteInstance()->GetProcess()->
+      GetBrowserContext()->GetResourceContext();
+  context->SetNetworkState(agent_->GetId(), offline);
+}
+
 // DOM agent handlers  --------------------------------------------------------
 
 scoped_refptr<DevToolsProtocol::Response>
@@ -314,6 +331,20 @@ RendererOverridesHandler::ClearBrowserCookies(
   return command->SuccessResponse(NULL);
 }
 
+scoped_refptr<DevToolsProtocol::Response>
+RendererOverridesHandler::EmulateNetworkConditions(
+    scoped_refptr<DevToolsProtocol::Command> command) {
+  base::DictionaryValue* params = command->params();
+  bool offline = false;
+  const char* offline_param =
+      devtools::Network::emulateNetworkConditions::kParamOffline;
+  if (!params || !params->GetBoolean(offline_param, &offline))
+    return command->InvalidParamResponse(offline_param);
+
+  UpdateNetworkState(offline);
+  return command->SuccessResponse(NULL);
+}
+
 
 // Page agent handlers  -------------------------------------------------------