Implement clipboardRead/Write content capabilities

chrome/renderer/content_settings_observer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/content_settings_observer.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/render_messages.h"
@@ skipping 397 matching lines @@
   cached_storage_permissions_[key] = result;
   return result;
 }
 
 bool ContentSettingsObserver::allowReadFromClipboard(bool default_value) {
   bool allowed = false;
 #if defined(ENABLE_EXTENSIONS)
   extensions::ScriptContext* calling_context =
       extension_dispatcher_->script_context_set().GetCalling();
   if (calling_context) {
-    const extensions::Extension* extension =
-        calling_context->effective_extension();
-    allowed = extension &&
-              extension->permissions_data()->HasAPIPermission(
-                  extensions::APIPermission::kClipboardRead);
+    allowed = calling_context->HasEffectiveAPIPermission(
+        extensions::APIPermission::kClipboardRead);
   }
 #endif
   return allowed;
 }
 
 bool ContentSettingsObserver::allowWriteToClipboard(bool default_value) {
   bool allowed = false;
 #if defined(ENABLE_EXTENSIONS)
   // All blessed extension pages could historically write to the clipboard, so
   // preserve that for compatibility.
   extensions::ScriptContext* calling_context =
       extension_dispatcher_->script_context_set().GetCalling();
   if (calling_context) {
     if (calling_context->effective_context_type() ==
         extensions::Feature::BLESSED_EXTENSION_CONTEXT) {
       allowed = true;
     } else {
-      const extensions::Extension* extension =
-          calling_context->effective_extension();
-      allowed = extension &&
-                extension->permissions_data()->HasAPIPermission(
-                    extensions::APIPermission::kClipboardWrite);
+      allowed = calling_context->HasEffectiveAPIPermission(
+          extensions::APIPermission::kClipboardWrite);
     }
   }
 #endif
   return allowed;
 }
 
 bool ContentSettingsObserver::allowMutationEvents(bool default_value) {
   return IsPlatformApp() ? false : default_value;
 }
 
@@ skipping 260 matching lines @@
 
   // If the scheme is file:, an empty file name indicates a directory listing,
   // which requires JavaScript to function properly.
   if (EqualsASCII(origin.protocol(), url::kFileScheme)) {
     return document_url.SchemeIs(url::kFileScheme) &&
            document_url.ExtractFileName().empty();
   }
 
   return false;
 }