DevTools: merge devtools_http_handler into content - it is used in all the embedders anyways.

chrome/browser/android/devtools_manager_delegate_android.h

Index: chrome/browser/android/devtools_manager_delegate_android.h
diff --git a/chrome/browser/android/devtools_manager_delegate_android.h b/chrome/browser/android/devtools_manager_delegate_android.h
index ee3f226b324e7bff41cff2f2e2d072f1cd70c8fe..e825f01f3b2ab8e32df0bf7ae9f7e462cee2bab9 100644
--- a/chrome/browser/android/devtools_manager_delegate_android.h
+++ b/chrome/browser/android/devtools_manager_delegate_android.h
@@ -29,6 +29,8 @@ class DevToolsManagerDelegateAndroid : public content::DevToolsManagerDelegate {
   std::string GetTargetTitle(content::RenderFrameHost* host) override;
   scoped_refptr<content::DevToolsAgentHost> CreateNewTarget(
       const GURL& url) override;
+  std::string GetDiscoveryPageHTML() override;
+  std::string GetFrontendResource(const std::string& path) override;
 
  private:
   std::unique_ptr<DevToolsNetworkProtocolHandler> network_protocol_handler_;