Fix URL constants deps in Renderer ContentSettingsObserver

The file #includes chrome/common/url_constants.h while it only needs url/ and content/public/common url_constants.h. This CL fixes that.

BUG=384874

Review URL: https://codereview.chromium.org/799923002

Cr-Commit-Position: refs/heads/master@{#308602}

chrome/renderer/content_settings_observer.cc

@@ -7,7 +7,7 @@
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "chrome/common/render_messages.h"
-#include "chrome/common/url_constants.h"
+#include "content/public/common/url_constants.h"
 #include "content/public/renderer/document_state.h"
 #include "content/public/renderer/navigation_state.h"
 #include "content/public/renderer/render_frame.h"
@@ -20,6 +20,7 @@
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/web/WebView.h"
+#include "url/url_constants.h"
 
 #if defined(ENABLE_EXTENSIONS)
 #include "chrome/common/extensions/chrome_extension_messages.h"