ALL-IN-ONE: Optimization to previousBoundary() and nextBoundary()

third_party/WebKit/Source/core/editing/iterators/SearchBuffer.cpp

Index: third_party/WebKit/Source/core/editing/iterators/SearchBuffer.cpp
diff --git a/third_party/WebKit/Source/core/editing/iterators/SearchBuffer.cpp b/third_party/WebKit/Source/core/editing/iterators/SearchBuffer.cpp
index 11ee7e096e9eb7a9c8bc6a28c2e87b1bc1d4f6c2..fbed1318f04bebb57d8434df9e332629a995a972 100644
--- a/third_party/WebKit/Source/core/editing/iterators/SearchBuffer.cpp
+++ b/third_party/WebKit/Source/core/editing/iterators/SearchBuffer.cpp
@@ -380,7 +380,7 @@ static size_t findPlainTextInternal(CharacterIteratorAlgorithm<Strategy>& it, co
 
     if (buffer.needsMoreContext()) {
         for (SimplifiedBackwardsTextIteratorAlgorithm<Strategy> backwardsIterator(PositionTemplate<Strategy>::firstPositionInNode(it.ownerDocument()), PositionTemplate<Strategy>(it.currentContainer(), it.startOffset())); !backwardsIterator.atEnd(); backwardsIterator.advance()) {
-            Vector<UChar, 1024> characters;
+            BackwardsTextBuffer characters;
             backwardsIterator.copyTextTo(characters);
             buffer.prependContext(characters.data(), characters.size());
             if (!buffer.needsMoreContext())
@@ -389,7 +389,10 @@ static size_t findPlainTextInternal(CharacterIteratorAlgorithm<Strategy>& it, co
     }
 
     while (!it.atEnd()) {
-        it.appendTextTo(buffer);
+        // TODO(xiaochengh): Should allow copying text to SearchBuffer directly
+        ForwardsTextBuffer characters;
+        it.copyTextTo(characters);
+        buffer.append(characters.data(), characters.size());
         it.advance(buffer.numberOfCharactersJustAppended());
 tryAgain:
         size_t matchStartOffset;