Make URLPattern::OverlapsWith handle wildcards better by expanding them to explicit schemes.

chrome/common/extensions/url_pattern_unittest.cc

Index: chrome/common/extensions/url_pattern_unittest.cc
diff --git a/chrome/common/extensions/url_pattern_unittest.cc b/chrome/common/extensions/url_pattern_unittest.cc
index ef1406bbe3f7625e9dcca36061e8d12789acd880..05b114f17855780bc90a30eb3c420fa35cb16260 100644
--- a/chrome/common/extensions/url_pattern_unittest.cc
+++ b/chrome/common/extensions/url_pattern_unittest.cc
@@ -366,6 +366,21 @@ TEST(ExtensionURLPatternTest, OverlapsWith) {
   // Test that '<all_urls>' includes file URLs, while scheme '*' does not.
   TestPatternOverlap(pattern7, pattern8, false);
   TestPatternOverlap(pattern7, pattern10, true);
+
+  // Test that wildcard schemes are handled correctly, especially when compared
+  // to each-other.
+  URLPattern pattern11(kAllSchemes, "http://example.com/*");
+  URLPattern pattern12(kAllSchemes, "*://example.com/*");
+  URLPattern pattern13(kAllSchemes, "*://example.com/foo/*");
+  URLPattern pattern14(kAllSchemes, "*://google.com/*");
+  TestPatternOverlap(pattern8, pattern12, true);
+  TestPatternOverlap(pattern9, pattern12, true);
+  TestPatternOverlap(pattern10, pattern12, true);
+  TestPatternOverlap(pattern11, pattern12, true);
+  TestPatternOverlap(pattern12, pattern13, true);
+  TestPatternOverlap(pattern11, pattern13, true);
+  TestPatternOverlap(pattern14, pattern12, false);
+  TestPatternOverlap(pattern14, pattern13, false);
 }
 
 TEST(ExtensionURLPatternTest, ConvertToExplicitSchemes) {