Fix ODR violation in Blink

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index a6d00fdaf5c6e695a8977b6533c4f9a7d4597d81..fbe421bc71978f52203a339ba876c9c3b362965e 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -850,6 +850,8 @@ bool HTMLCanvasElement::shouldAccelerate(const IntSize& size) const {
   return true;
 }
 
+namespace {
+
 class UnacceleratedSurfaceFactory
     : public RecordingImageBufferFallbackSurfaceFactory {
  public:
@@ -865,6 +867,8 @@ class UnacceleratedSurfaceFactory
   virtual ~UnacceleratedSurfaceFactory() {}
 };
 
+}  // namespace
+
 bool HTMLCanvasElement::shouldUseDisplayList(const IntSize& deviceSize) {
   if (m_context->colorSpace() != kLegacyCanvasColorSpace)
     return false;