Explicitly set text direction for TextRuns

Source/platform/text/BidiResolver.h

Index: Source/platform/text/BidiResolver.h
diff --git a/Source/platform/text/BidiResolver.h b/Source/platform/text/BidiResolver.h
index 68aeec1027e7aaab2495df8329bc239e00806de1..c25705290ccf60d1af212d8729d572a7b74c10d4 100644
--- a/Source/platform/text/BidiResolver.h
+++ b/Source/platform/text/BidiResolver.h
@@ -219,7 +219,7 @@ public:
     void embed(WTF::Unicode::Direction, BidiEmbeddingSource);
     bool commitExplicitEmbedding();
 
-    void createBidiRunsForLine(const Iterator& end, VisualDirectionOverride = NoVisualOverride, bool hardLineBreak = false);
+    void createBidiRunsForLine(const Iterator& end, VisualDirectionOverride = NoVisualOverride, bool hardLineBreak = false, bool reorderRuns = true);

[leviw_travelin_and_unemployed, 2014/01/09 00:49:54]

Boolean params make me sad. It'd be great if we could use an Enum instead.

 
     BidiRunList<Run>& runs() { return m_runs; }
 
@@ -635,7 +635,7 @@ TextDirection BidiResolver<Iterator, Run>::determineParagraphDirectionality(bool
 }
 
 template <class Iterator, class Run>
-void BidiResolver<Iterator, Run>::createBidiRunsForLine(const Iterator& end, VisualDirectionOverride override, bool hardLineBreak)
+void BidiResolver<Iterator, Run>::createBidiRunsForLine(const Iterator& end, VisualDirectionOverride override, bool hardLineBreak, bool reorderRuns)
 {
     using namespace WTF::Unicode;
 
@@ -1034,7 +1034,8 @@ void BidiResolver<Iterator, Run>::createBidiRunsForLine(const Iterator& end, Vis
     }
 
     m_runs.setLogicallyLastRun(m_runs.lastRun());
-    reorderRunsFromLevels();
+    if (reorderRuns)
+        reorderRunsFromLevels();
     m_endOfRunAtEndOfLine = Iterator();
     m_endOfLine = Iterator();