Implement clipboardRead/Write content capabilities

extensions/common/manifest_handlers/content_capabilities_handler.cc

Index: extensions/common/manifest_handlers/content_capabilities_handler.cc
diff --git a/extensions/common/manifest_handlers/content_capabilities_handler.cc b/extensions/common/manifest_handlers/content_capabilities_handler.cc
index a55bb8273d215eded92b4bffffff6acee66f79fb..2b506361c3b620b75574465246716d765feca1b7 100644
--- a/extensions/common/manifest_handlers/content_capabilities_handler.cc
+++ b/extensions/common/manifest_handlers/content_capabilities_handler.cc
@@ -4,11 +4,13 @@
 
 #include "extensions/common/manifest_handlers/content_capabilities_handler.h"
 
+#include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
+#include "content/public/common/content_switches.h"
 #include "extensions/common/api/extensions_manifest_types.h"
 #include "extensions/common/error_utils.h"
 #include "extensions/common/install_warning.h"
@@ -61,10 +63,17 @@ bool ContentCapabilitiesHandler::Parse(Extension* extension,
   if (!capabilities)
     return false;
 
+  int supported_schemes = URLPattern::SCHEME_HTTPS;
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kTestType)) {
+    // We don't have a suitable HTTPS test server, so this will have to do.
+    supported_schemes |= URLPattern::SCHEME_HTTP;
+  }
+
   std::string url_error;
   URLPatternSet potential_url_patterns;
   if (!potential_url_patterns.Populate(capabilities->matches,
-          URLPattern::SCHEME_HTTPS, false /* allow_file_access */,
+          supported_schemes, false /* allow_file_access */,
           &url_error)) {
     *error = ErrorUtils::FormatErrorMessageUTF16(
         errors::kInvalidContentCapabilitiesMatch, url_error);