Add platform/geometry pretty printers for logging and testing

third_party/WebKit/Source/platform/LayoutUnitTest.cpp

Index: third_party/WebKit/Source/platform/LayoutUnitTest.cpp
diff --git a/third_party/WebKit/Source/platform/LayoutUnitTest.cpp b/third_party/WebKit/Source/platform/LayoutUnitTest.cpp
index 4b27c33b7daa8fc4362ceee89d177120cfc002b7..84a1e51999d4bfebe7e154341a0aa92f3e5d6a16 100644
--- a/third_party/WebKit/Source/platform/LayoutUnitTest.cpp
+++ b/third_party/WebKit/Source/platform/LayoutUnitTest.cpp
@@ -271,4 +271,28 @@ TEST(LayoutUnitTest, UnaryMinus)
     EXPECT_EQ(LayoutUnit::max(), -LayoutUnit::min());
 }
 
+TEST(LayoutUnitTest, Formatting)
+{
+    LayoutUnit zero;
+    std::ostringstream zeroStream;
+    zeroStream << zero;
+    EXPECT_EQ("0", zeroStream.str());
+
+    std::ostringstream maxStream;
+    maxStream << LayoutUnit::max();
+    EXPECT_EQ("LayoutUnit::max(3.35544e+07)", maxStream.str());
+
+    std::ostringstream minStream;
+    minStream << LayoutUnit::min();
+    EXPECT_EQ("LayoutUnit::min(-3.35544e+07)", minStream.str());
+
+    std::ostringstream nearlyMaxStream;
+    nearlyMaxStream << LayoutUnit::nearlyMax();
+    EXPECT_EQ("LayoutUnit::nearlyMax(3.35544e+07)", nearlyMaxStream.str());
+
+    std::ostringstream nearlyMinStream;
+    nearlyMinStream << LayoutUnit::nearlyMin();
+    EXPECT_EQ("LayoutUnit::nearlyMin(-3.35544e+07)", nearlyMinStream.str());
+}
+
 } // namespace blink