Allow ParsedContentType to reject multiple definitions of the same parameter

third_party/WebKit/Source/platform/network/ParsedContentTypeTest.cpp

Index: third_party/WebKit/Source/platform/network/ParsedContentTypeTest.cpp
diff --git a/third_party/WebKit/Source/platform/network/ParsedContentTypeTest.cpp b/third_party/WebKit/Source/platform/network/ParsedContentTypeTest.cpp
index 7a40f21fec02b2ec4ed2a2eb4dae12ac30fa4d5e..8729bbe85e287095b141b1461d3de6df5f1ef71c 100644
--- a/third_party/WebKit/Source/platform/network/ParsedContentTypeTest.cpp
+++ b/third_party/WebKit/Source/platform/network/ParsedContentTypeTest.cpp
@@ -133,6 +133,13 @@ TEST(ParsedContentTypeTest, RelaxedParameterName) {
   EXPECT_EQ("u", t.parameterValueForName("y"));
 }
 
+TEST(ParsedContentTypeTest, StrictParameterName) {
+  EXPECT_TRUE(isValid("text/plain", Mode::Strict));
+  EXPECT_TRUE(isValid("text/plain; p1=a", Mode::Strict));
+  EXPECT_FALSE(isValid("text/plain; p1=a; p1=b", Mode::Strict));
+  EXPECT_TRUE(isValid("text/plain; p1=a; p2=b", Mode::Strict));
+}
+
 }  // namespace
 
 }  // namespace blink