[WIP] Attempt to move everything cssom into a cssom namespace

third_party/WebKit/Source/core/css/cssom/CSSCalcLength.cpp

Index: third_party/WebKit/Source/core/css/cssom/CSSCalcLength.cpp
diff --git a/third_party/WebKit/Source/core/css/cssom/CSSCalcLength.cpp b/third_party/WebKit/Source/core/css/cssom/CSSCalcLength.cpp
index 4d1b56531ffb75d5eccf8ff7a707a615844f0faa..a9e143a5fadb5e223408989614e706fe81f7ede6 100644
--- a/third_party/WebKit/Source/core/css/cssom/CSSCalcLength.cpp
+++ b/third_party/WebKit/Source/core/css/cssom/CSSCalcLength.cpp
@@ -11,6 +11,7 @@
 #include "wtf/Vector.h"
 
 namespace blink {
+namespace cssom {
 
 CSSCalcLength::CSSCalcLength() : m_values(CSSLengthValue::kNumSupportedUnits), m_hasValues(CSSLengthValue::kNumSupportedUnits) {}
 
@@ -148,4 +149,6 @@ int CSSCalcLength::indexForUnit(CSSPrimitiveValue::UnitType unit)
     return (static_cast<int>(unit) - static_cast<int>(CSSPrimitiveValue::UnitType::Percentage));
 }
 
+} // namespace cssom
 } // namespace blink
+