Implement clipboardRead/Write content capabilities

extensions/renderer/script_context.cc

Index: extensions/renderer/script_context.cc
diff --git a/extensions/renderer/script_context.cc b/extensions/renderer/script_context.cc
index 6a7629e300b6f88a322651fa459a815c7cae6eac..b51921955ef85b7f01649723f2bd82a38f7ee838 100644
--- a/extensions/renderer/script_context.cc
+++ b/extensions/renderer/script_context.cc
@@ -17,6 +17,7 @@
 #include "extensions/common/extension_api.h"
 #include "extensions/common/extension_urls.h"
 #include "extensions/common/features/base_feature_provider.h"
+#include "extensions/common/permissions/permissions_data.h"
 #include "gin/per_context_data.h"
 #include "third_party/WebKit/public/web/WebDataSource.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
@@ -273,4 +274,20 @@ gin::ContextHolder* ScriptContext::GetContextHolder() {
   return gin::PerContextData::From(v8_context())->context_holder();
 }
 
+void ScriptContext::SetContentCapabilities(
+    const APIPermissionSet& permissions) {
+  content_capabilities_ = permissions;

[not at google - send to devlin, 2014/12/10 17:33:54]

Can you just make ScriptContext (lazily, I suppose) create content_capabilities_
internally, rather than requiring proxying through Dispatcher?

[Ken Rockot(use gerrit already), 2014/12/10 18:31:41]

What about handling the case where an extension (which grants
content_capabilities) is unloaded? That was the deciding motivation for doing
this through Dispatcher::UpdateBindings.

+}
+
+bool ScriptContext::HasEffectiveAPIPermission(
+    APIPermission::ID permission) const {
+  if (content_capabilities_.find(permission) != content_capabilities_.end())
+    return true;

[not at google - send to devlin, 2014/12/10 17:33:54]

Consider being a little conservative here, and checking that it's actually a web
context type as well.

+  if (effective_extension_.get()) {
+    return effective_extension_->permissions_data()->HasAPIPermission(
+        permission);
+  }
+  return false;
+}
+
 }  // namespace extensions