Move RenderTextInfo and WordMeasurement into their own headers.

Source/core/rendering/line/BreakingContextInlineHeaders.h

Index: Source/core/rendering/line/BreakingContextInlineHeaders.h
diff --git a/Source/core/rendering/line/BreakingContextInlineHeaders.h b/Source/core/rendering/line/BreakingContextInlineHeaders.h
index ad250d2e3e63a8779ac35a7a54854d1298f96724..2fc4fa2fdee97d442919a35c04c713ddd875ab3e 100644
--- a/Source/core/rendering/line/BreakingContextInlineHeaders.h
+++ b/Source/core/rendering/line/BreakingContextInlineHeaders.h
@@ -35,7 +35,9 @@
 #include "core/rendering/line/LineBreaker.h"
 #include "core/rendering/line/LineInfo.h"
 #include "core/rendering/line/LineWidth.h"
+#include "core/rendering/line/RenderTextInfo.h"
 #include "core/rendering/line/TrailingObjects.h"
+#include "core/rendering/line/WordMeasurement.h"
 #include "core/rendering/svg/RenderSVGInlineText.h"
 
 namespace WebCore {
@@ -43,23 +45,6 @@ namespace WebCore {
 // We don't let our line box tree for a single line get any deeper than this.
 const unsigned cMaxLineDepth = 200;
 
-class WordMeasurement {
-public:
-    WordMeasurement()
-        : renderer(0)
-        , width(0)
-        , startOffset(0)
-        , endOffset(0)
-    {
-    }
-
-    RenderText* renderer;
-    float width;
-    int startOffset;
-    int endOffset;
-    HashSet<const SimpleFontData*> fallbackFonts;
-};
-
 class BreakingContext {
 public:
     BreakingContext(InlineBidiResolver& resolver, LineInfo& inLineInfo, LineWidth& lineWidth, RenderTextInfo& inRenderTextInfo, FloatingObject* inLastFloatFromPreviousLine, bool appliedStartWidth, RenderBlockFlow* block)