Revert of DevTools: Made id unique across different remote browsers

chrome/browser/devtools/device/devtools_android_bridge.cc

Index: chrome/browser/devtools/device/devtools_android_bridge.cc
diff --git a/chrome/browser/devtools/device/devtools_android_bridge.cc b/chrome/browser/devtools/device/devtools_android_bridge.cc
index e36e78584504c6c32206830c762f4843fe1bcd91..db7f1f5f4262b7ae0dc618db73f88cb8bbafb803 100644
--- a/chrome/browser/devtools/device/devtools_android_bridge.cc
+++ b/chrome/browser/devtools/device/devtools_android_bridge.cc
@@ -311,10 +311,10 @@
     const std::string& id,
     scoped_refptr<DevToolsAndroidBridge::RemoteBrowser> browser,
     const std::string& debug_url) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  AgentHostDelegates::iterator it = g_host_delegates.Get().find(id);
-  if (it != g_host_delegates.Get().end())
-    return it->second->agent_host_;
+   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+   AgentHostDelegates::iterator it = g_host_delegates.Get().find(id);
+   if (it != g_host_delegates.Get().end())
+     return it->second->agent_host_;
 
   AgentHostDelegate* delegate = new AgentHostDelegate(id, browser, debug_url);
   scoped_refptr<content::DevToolsAgentHost> result =
@@ -415,7 +415,6 @@
   std::string frontend_url_;
   std::string remote_id_;
   std::string remote_type_;
-  std::string local_id_;
   DISALLOW_COPY_AND_ASSIGN(RemotePageTarget);
 };
 
@@ -452,8 +451,7 @@
       browser_(browser),
       debug_url_(GetDebugURL(value)),
       remote_id_(GetStringProperty(value, "id")),
-      remote_type_(GetStringProperty(value, "type")),
-      local_id_(BuildUniqueTargetId(browser.get(), value)) {
+      remote_type_(GetStringProperty(value, "type")) {
   set_type("adb_page");
   set_url(GURL(GetStringProperty(value, "url")));
   set_title(base::UTF16ToUTF8(net::UnescapeForHTML(base::UTF8ToUTF16(
@@ -482,7 +480,7 @@
 }
 
 std::string RemotePageTarget::GetId() const {
-  return local_id_;
+  return remote_id_;
 }
 
 bool RemotePageTarget::IsAttached() const {