Add an iframe permissions= attribute for implementing permission delegation

third_party/WebKit/Source/core/html/HTMLIFrameElementSandbox.cpp

Index: third_party/WebKit/Source/core/html/HTMLIFrameElementSandbox.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLIFrameElementSandbox.cpp b/third_party/WebKit/Source/core/html/HTMLIFrameElementSandbox.cpp
index 8a366af4c5f8544cd8ff28e3241a5478f06b2755..da3ca5a320138e6c7203ad221d2e108429bfc42d 100644
--- a/third_party/WebKit/Source/core/html/HTMLIFrameElementSandbox.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLIFrameElementSandbox.cpp
@@ -6,37 +6,42 @@
 
 namespace blink {
 
-HTMLIFrameElementSandbox::HTMLIFrameElementSandbox(DOMTokenListObserver* observer)
-    : DOMTokenList(observer)
+namespace {
+
+const char* kSupportedTokens[] = {
+    "allow-forms",
+    "allow-modals",
+    "allow-pointer-lock",
+    "allow-popups",
+    "allow-popups-to-escape-sandbox",
+    "allow-same-origin",
+    "allow-scripts",
+    "allow-top-navigation"
+};
+
+bool IsTokenSupported(const AtomicString& token)

[tkent, 2016/06/23 04:57:28]

With the current Blink coding style, this should be |isTokenSupported()|.

[raymes, 2016/06/27 08:09:50]

Done.

 {
+    for (const char* supportedToken : kSupportedTokens) {
+        if (token == supportedToken)
+            return true;
+    }
+    return false;
 }
 
-HTMLIFrameElementSandbox::~HTMLIFrameElementSandbox()
+} // namespace
+
+HTMLIFrameElementSandbox::HTMLIFrameElementSandbox(DOMTokenListObserver* observer)
+    : DOMTokenList(observer)
 {
 }
 
-using SandboxSupportedTokens = HashSet<AtomicString>;
-
-static SandboxSupportedTokens& supportedTokens()
+HTMLIFrameElementSandbox::~HTMLIFrameElementSandbox()
 {
-    DEFINE_STATIC_LOCAL(SandboxSupportedTokens, supportedValues, ());
-    if (supportedValues.isEmpty()) {
-        supportedValues.add("allow-forms");
-        supportedValues.add("allow-modals");
-        supportedValues.add("allow-pointer-lock");
-        supportedValues.add("allow-popups");
-        supportedValues.add("allow-popups-to-escape-sandbox");
-        supportedValues.add("allow-same-origin");
-        supportedValues.add("allow-scripts");
-        supportedValues.add("allow-top-navigation");
-    }
-
-    return supportedValues;
 }
 
 bool HTMLIFrameElementSandbox::validateTokenValue(const AtomicString& tokenValue, ExceptionState&) const
 {
-    return supportedTokens().contains(tokenValue);
+    return IsTokenSupported(tokenValue);
 }
 
 } // namespace blink