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

headless/lib/browser/headless_browser_main_parts.h

Index: headless/lib/browser/headless_browser_main_parts.h
diff --git a/headless/lib/browser/headless_browser_main_parts.h b/headless/lib/browser/headless_browser_main_parts.h
index 2a458a8dce28b27eb0655ff5106cb80e8e2da3a3..43d396839dd110467701baacca6504e21a8f6e79 100644
--- a/headless/lib/browser/headless_browser_main_parts.h
+++ b/headless/lib/browser/headless_browser_main_parts.h
@@ -10,10 +10,6 @@
 #include "content/public/browser/browser_main_parts.h"
 #include "headless/public/headless_browser.h"
 
-namespace devtools_http_handler {
-class DevToolsHttpHandler;
-}
-
 namespace headless {
 
 class HeadlessBrowserContextImpl;
@@ -30,8 +26,6 @@ class HeadlessBrowserMainParts : public content::BrowserMainParts {
 
  private:
   HeadlessBrowserImpl* browser_;  // Not owned.
-  std::unique_ptr<devtools_http_handler::DevToolsHttpHandler>
-      devtools_http_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserMainParts);
 };