Use explicit WebString <-> string16 conversion methods in storage API files

third_party/WebKit/Source/platform/exported/FilePathConversionTest.cpp

Index: third_party/WebKit/Source/platform/exported/FilePathConversionTest.cpp
diff --git a/third_party/WebKit/Source/platform/exported/FilePathConversionTest.cpp b/third_party/WebKit/Source/platform/exported/FilePathConversionTest.cpp
index f8d73de435b8ae7d2690d6b90579b64e951a2362..d04548bc72034cf185e01348bc3ab20b23ff1220 100644
--- a/third_party/WebKit/Source/platform/exported/FilePathConversionTest.cpp
+++ b/third_party/WebKit/Source/platform/exported/FilePathConversionTest.cpp
@@ -40,6 +40,15 @@ TEST(FilePathConversionTest, convert) {
             WebStringToFilePath(test16bitString).value());
   EXPECT_EQ(pathLatin1.value(), WebStringToFilePath(test16bitLatin1).value());
   EXPECT_EQ(pathUTF16.value(), WebStringToFilePath(test16bitUTF16).value());
+
+  EXPECT_STREQ("path",
+               FilePathToWebString(base::FilePath(FILE_PATH_LITERAL("path")))
+                   .utf8()
+                   .data());
+  EXPECT_STREQ(test8bitLatin1.utf8().data(),
+               FilePathToWebString(pathLatin1).utf8().data());
+  EXPECT_STREQ(test16bitUTF16.utf8().data(),
+               FilePathToWebString(pathUTF16).utf8().data());
 }
 
 }  // namespace blink