Make classes and structures in core/style, core/plugins and core/streams fast-allocated.

Source/core/style/BorderImageLength.h

Index: Source/core/style/BorderImageLength.h
diff --git a/Source/core/style/BorderImageLength.h b/Source/core/style/BorderImageLength.h
index a52e788cd15d802f9d3d12c840aa25ad10f180a2..0dd8df7cb098056f9ea793e43d703aad4d4a896f 100644
--- a/Source/core/style/BorderImageLength.h
+++ b/Source/core/style/BorderImageLength.h
@@ -32,6 +32,7 @@
 #define BorderImageLength_h
 
 #include "platform/Length.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
@@ -40,6 +41,7 @@ namespace blink {
 // http://www.w3.org/TR/css3-background/#border-image-width
 // http://www.w3.org/TR/css3-background/#border-image-outset
 class BorderImageLength {
+    DISALLOW_ALLOCATION();
 public:
     BorderImageLength(double number)
         : m_number(number)