JavaScript to Value bridge.

Add more values that we can get back from JavaScript.  Very useful for writing
additional DOMUI browser test, and maybe in other cases as well.

BUG=none
TEST=RenderViewHostTest.ExecuteJavascriptInWebFrameNotifyResult

Review URL: http://codereview.chromium.org/4924001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@68416 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 12 insertions, 0 deletions

diff --git a/base/values.cc b/base/values.cc
index c6a377f..b06df12 100644
--- a/base/values.cc
+++ b/base/values.cc
@@ -119,6 +119,10 @@ bool Value::GetAsString(string16* out_value) const {
   return false;
 }
 
+bool Value::GetAsList(ListValue** out_value) {
+  return false;
+}
+
 Value* Value::DeepCopy() const {
   // This method should only be getting called for null Values--all subclasses
   // need to provide their own implementation;.
@@ -961,6 +965,12 @@ bool ListValue::Insert(size_t index, Value* in_value) {
   return true;
 }
 
+bool ListValue::GetAsList(ListValue** out_value) {
+  if (out_value)
+    *out_value = this;
+  return true;
+}
+
 Value* ListValue::DeepCopy() const {
   ListValue* result = new ListValue;
 
diff --git a/base/values.h b/base/values.h
index ac226fa..f020405 100644
--- a/base/values.h
+++ b/base/values.h
@@ -92,6 +92,7 @@ class Value {
   virtual bool GetAsReal(double* out_value) const;
   virtual bool GetAsString(std::string* out_value) const;
   virtual bool GetAsString(string16* out_value) const;
+  virtual bool GetAsList(ListValue** out_value);
 
   // This creates a deep copy of the entire Value tree, and returns a pointer
   // to the copy.  The caller gets ownership of the copy, of course.
@@ -366,6 +367,7 @@ class ListValue : public Value {
   ~ListValue();
 
   // Subclassed methods
+  virtual bool GetAsList(ListValue** out_value);
   Value* DeepCopy() const;
   virtual bool Equals(const Value* other) const;