Re-implement app overlap detection with new extent syntax.

chrome/common/extensions/extension_extent_unittest.cc

Index: chrome/common/extensions/extension_extent_unittest.cc
diff --git a/chrome/common/extensions/extension_extent_unittest.cc b/chrome/common/extensions/extension_extent_unittest.cc
index 41f2d15e7d4276628f313de40606754c86ce4be7..eb2d436c83a348a3ea0aaaad8e0f0a5fba4cd5ab 100644
--- a/chrome/common/extensions/extension_extent_unittest.cc
+++ b/chrome/common/extensions/extension_extent_unittest.cc
@@ -33,3 +33,24 @@ TEST(ExtensionExtentTest, Two) {
   EXPECT_TRUE(extent.ContainsURL(GURL("http://www.yahoo.com/monkey")));
   EXPECT_FALSE(extent.ContainsURL(GURL("https://www.apple.com/monkey")));
 }
+
+TEST(ExtensionExtentTest, OverlapsWith) {
+  ExtensionExtent extent1;
+  extent1.AddPattern(*URLPattern::CreateFromString("http://www.google.com/f*"));
+  extent1.AddPattern(*URLPattern::CreateFromString("http://www.yahoo.com/b*"));
+
+  ExtensionExtent extent2;
+  extent2.AddPattern(*URLPattern::CreateFromString("http://www.reddit.com/f*"));
+  extent2.AddPattern(*URLPattern::CreateFromString("http://www.yahoo.com/z*"));
+
+  ExtensionExtent extent3;
+  extent3.AddPattern(*URLPattern::CreateFromString(
+      "http://www.google.com/q/*"));
+  extent3.AddPattern(*URLPattern::CreateFromString("http://www.yahoo.com/b/*"));
+
+  EXPECT_FALSE(extent1.OverlapsWith(extent2));
+  EXPECT_FALSE(extent2.OverlapsWith(extent1));
+
+  EXPECT_TRUE(extent1.OverlapsWith(extent3));
+  EXPECT_TRUE(extent3.OverlapsWith(extent1));
+}