Allow whitelisted content scripts to be injected in WebViews.

extensions/renderer/user_script_set.cc

Index: extensions/renderer/user_script_set.cc
diff --git a/extensions/renderer/user_script_set.cc b/extensions/renderer/user_script_set.cc
index 58e9de17cc89bb0fd72d755af79f92e4ff474aba..2404d7441e362447adee399f8f5f72ea1cd11934 100644
--- a/extensions/renderer/user_script_set.cc
+++ b/extensions/renderer/user_script_set.cc
@@ -9,6 +9,7 @@
 #include "content/public/renderer/render_thread.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_set.h"
+#include "extensions/common/extensions_client.h"
 #include "extensions/common/permissions/permissions_data.h"
 #include "extensions/renderer/extension_injection_host.h"
 #include "extensions/renderer/extensions_renderer_client.h"
@@ -86,7 +87,8 @@ void UserScriptSet::GetInjections(
 }
 
 bool UserScriptSet::UpdateUserScripts(base::SharedMemoryHandle shared_memory,
-                                      const std::set<HostID>& changed_hosts) {
+                                      const std::set<HostID>& changed_hosts,
+                                      bool whitelisted_only) {
   bool only_inject_incognito =
       ExtensionsRendererClient::Get()->IsIncognitoProcess();
 
@@ -140,6 +142,15 @@ bool UserScriptSet::UpdateUserScripts(base::SharedMemoryHandle shared_memory,
     if (only_inject_incognito && !script->is_incognito_enabled())
       continue;  // This script shouldn't run in an incognito tab.
 
+    if (whitelisted_only) {
+      const ExtensionsClient::ScriptingWhitelist& whitelist =

[not at google - send to devlin, 2015/05/15 00:05:36]

PermissionsData::CanExecuteScriptEverywhere is simpler. You could even choose to
put it in a single conditional then...

[dmazzoni, 2015/05/15 17:33:57]

PermissionsData::CanExecuteScriptEverywhere takes an Extension but we just have
a UserScript, so I added a new static function
PermissionsData::IsExtensionIdWhitelisted.

[not at google - send to devlin, 2015/05/15 17:38:11]

You should be able to extract an Extension from |extensions_|?

[dmazzoni, 2015/05/15 17:56:28]

Done.

+          ExtensionsClient::Get()->GetScriptingWhitelist();
+      if (std::find(whitelist.begin(), whitelist.end(),
+                    script->extension_id()) == whitelist.end()) {
+        continue;
+      }
+    }
+
     scripts_.push_back(script.release());
   }