Created devtools_discovery component.

New discovery is used in content shell, extensions and chromecast. Once all embedders migrate to devtools_discovery, DevToolsTarget will be removed from content.

BUG=476496

Review URL: https://codereview.chromium.org/1056343004

Cr-Commit-Position: refs/heads/master@{#326337}

3 files changed, 7 insertions, 67 deletions

diff --git a/chromecast/browser/DEPS b/chromecast/browser/DEPS
index e91498e..5306642 100644
--- a/chromecast/browser/DEPS
+++ b/chromecast/browser/DEPS
@@ -4,6 +4,7 @@ include_rules = [
   "+cc/base/switches.h",
   "+chromecast",
   "+components/crash",
+  "+components/devtools_discovery",
   "+components/devtools_http_handler",
   "+components/network_hints/browser",
   "+content/public/browser",
diff --git a/chromecast/browser/devtools/cast_dev_tools_delegate.cc b/chromecast/browser/devtools/cast_dev_tools_delegate.cc
index d5bbf17..4144727 100644
--- a/chromecast/browser/devtools/cast_dev_tools_delegate.cc
+++ b/chromecast/browser/devtools/cast_dev_tools_delegate.cc
@@ -7,6 +7,7 @@
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
+#include "components/devtools_discovery/devtools_discovery_manager.h"
 #include "content/public/browser/devtools_agent_host.h"
 #include "content/public/browser/devtools_target.h"
 #include "content/public/browser/favicon_status.h"
@@ -20,67 +21,6 @@
 namespace chromecast {
 namespace shell {
 
-namespace {
-
-const char kTargetTypePage[] = "page";
-const char kTargetTypeServiceWorker[] = "service_worker";
-const char kTargetTypeSharedWorker[] = "worker";
-const char kTargetTypeOther[] = "other";
-
-class Target : public content::DevToolsTarget {
- public:
-  explicit Target(scoped_refptr<content::DevToolsAgentHost> agent_host);
-
-  std::string GetId() const override { return agent_host_->GetId(); }
-  std::string GetParentId() const override { return std::string(); }
-  std::string GetType() const override {
-    switch (agent_host_->GetType()) {
-      case content::DevToolsAgentHost::TYPE_WEB_CONTENTS:
-        return kTargetTypePage;
-      case content::DevToolsAgentHost::TYPE_SERVICE_WORKER:
-        return kTargetTypeServiceWorker;
-      case content::DevToolsAgentHost::TYPE_SHARED_WORKER:
-        return kTargetTypeSharedWorker;
-      default:
-        break;
-    }
-    return kTargetTypeOther;
-  }
-  std::string GetTitle() const override { return agent_host_->GetTitle(); }
-  std::string GetDescription() const override { return std::string(); }
-  GURL GetURL() const override { return agent_host_->GetURL(); }
-  GURL GetFaviconURL() const override { return favicon_url_; }
-  base::TimeTicks GetLastActivityTime() const override {
-    return last_activity_time_;
-  }
-  bool IsAttached() const override { return agent_host_->IsAttached(); }
-  scoped_refptr<content::DevToolsAgentHost> GetAgentHost() const override {
-    return agent_host_;
-  }
-  bool Activate() const override { return agent_host_->Activate(); }
-  bool Close() const override { return agent_host_->Close(); }
-
- private:
-  scoped_refptr<content::DevToolsAgentHost> agent_host_;
-  GURL favicon_url_;
-  base::TimeTicks last_activity_time_;
-
-  DISALLOW_COPY_AND_ASSIGN(Target);
-};
-
-Target::Target(scoped_refptr<content::DevToolsAgentHost> agent_host)
-    : agent_host_(agent_host) {
-  if (content::WebContents* web_contents = agent_host_->GetWebContents()) {
-    content::NavigationController& controller = web_contents->GetController();
-    content::NavigationEntry* entry = controller.GetActiveEntry();
-    if (entry != NULL && entry->GetURL().is_valid())
-      favicon_url_ = entry->GetFavicon().url;
-    last_activity_time_ = web_contents->GetLastActiveTime();
-  }
-}
-
-}  // namespace
-
 // CastDevToolsDelegate -----------------------------------------------------
 
 CastDevToolsDelegate::CastDevToolsDelegate() {
@@ -129,12 +69,10 @@ CastDevToolsManagerDelegate::CreateNewTarget(const GURL& url) {
 
 void CastDevToolsManagerDelegate::EnumerateTargets(TargetCallback callback) {
   TargetList targets;
-  content::DevToolsAgentHost::List agents =
-      content::DevToolsAgentHost::GetOrCreateAll();
-  for (content::DevToolsAgentHost::List::iterator it = agents.begin();
-       it != agents.end(); ++it) {
-    targets.push_back(new Target(*it));
-  }
+  devtools_discovery::DevToolsDiscoveryManager* discovery_manager =
+      devtools_discovery::DevToolsDiscoveryManager::GetInstance();
+  for (const auto& descriptor : discovery_manager->GetDescriptors())
+    targets.push_back(descriptor);
   callback.Run(targets);
 }
 
diff --git a/chromecast/chromecast.gyp b/chromecast/chromecast.gyp
index b9198ac..f6056b0 100644
--- a/chromecast/chromecast.gyp
+++ b/chromecast/chromecast.gyp
@@ -188,6 +188,7 @@
         '../components/components.gyp:cdm_renderer',
         '../components/components.gyp:component_metrics_proto',
         '../components/components.gyp:crash_component',
+        '../components/components.gyp:devtools_discovery',
         '../components/components.gyp:devtools_http_handler',
         '../components/components.gyp:network_hints_browser',
         '../components/components.gyp:network_hints_renderer',