Floats following inlines break to next line unncessarily

Source/core/rendering/line/BreakingContextInlineHeaders.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 346 matching lines @@
 }
 
 inline void BreakingContext::handleFloat()
 {
     RenderBox* floatBox = toRenderBox(m_current.object());
     FloatingObject* floatingObject = m_block->insertFloatingObject(floatBox);
     // check if it fits in the current line.
     // If it does, position it now, otherwise, position
     // it after moving to next line (in newLine() func)
     // FIXME: Bug 110372: Properly position multiple stacked floats with non-rectangular shape outside.
-    if (m_floatsFitOnLine && m_width.fitsOnLine(m_block->logicalWidthForFloat(floatingObject).toFloat())) {
+    if (m_floatsFitOnLine && m_width.fitsOnLine(m_block->logicalWidthForFloat(floatingObject).toFloat(), true)) {
         m_block->positionNewFloatOnLine(floatingObject, m_lastFloatFromPreviousLine, m_lineInfo, m_width);
         if (m_lineBreak.object() == m_current.object()) {
             ASSERT(!m_lineBreak.offset());
             m_lineBreak.increment();
         }
     } else {
         m_floatsFitOnLine = false;
     }
     // Update prior line break context characters, using U+FFFD (OBJECT REPLACEMENT CHARACTER) for floating element.
     m_renderTextInfo.m_lineBreakIterator.updatePriorContext(replacementCharacter);
@@ skipping 261 matching lines @@
                 }
             }
 
             wordMeasurements.grow(wordMeasurements.size() + 1);
             WordMeasurement& wordMeasurement = wordMeasurements.last();
 
             wordMeasurement.renderer = renderText;
             wordMeasurement.endOffset = m_current.offset();
             wordMeasurement.startOffset = lastSpace;
 
-            float additionalTmpW;
+            float additionalTempWidth;
             if (wordTrailingSpaceWidth && c == ' ')
-                additionalTmpW = textWidth(renderText, lastSpace, m_current.offset() + 1 - lastSpace, font, m_width.currentWidth(), isFixedPitch, m_collapseWhiteSpace, &wordMeasurement.fallbackFonts) - wordTrailingSpaceWidth;
+                additionalTempWidth = textWidth(renderText, lastSpace, m_current.offset() + 1 - lastSpace, font, m_width.currentWidth(), isFixedPitch, m_collapseWhiteSpace, &wordMeasurement.fallbackFonts) - wordTrailingSpaceWidth;
             else
-                additionalTmpW = textWidth(renderText, lastSpace, m_current.offset() - lastSpace, font, m_width.currentWidth(), isFixedPitch, m_collapseWhiteSpace, &wordMeasurement.fallbackFonts);
+                additionalTempWidth = textWidth(renderText, lastSpace, m_current.offset() - lastSpace, font, m_width.currentWidth(), isFixedPitch, m_collapseWhiteSpace, &wordMeasurement.fallbackFonts);
 
-            wordMeasurement.width = additionalTmpW + wordSpacingForWordMeasurement;
-            additionalTmpW += lastSpaceWordSpacing;
-            m_width.addUncommittedWidth(additionalTmpW);
+            wordMeasurement.width = additionalTempWidth + wordSpacingForWordMeasurement;
+            additionalTempWidth += lastSpaceWordSpacing;
+            m_width.addUncommittedWidth(additionalTempWidth);
+
+            if (m_collapseWhiteSpace && previousCharacterIsSpace && m_currentCharacterIsSpace && additionalTempWidth)
+                m_width.setTrailingWhitespaceWidth(additionalTempWidth);
+
             if (!m_appliedStartWidth) {
                 m_width.addUncommittedWidth(inlineLogicalWidth(m_current.object(), true, false).toFloat());
                 m_appliedStartWidth = true;
             }
 
             applyWordSpacing = wordSpacing && m_currentCharacterIsSpace;
 
             if (!m_width.committedWidth() && m_autoWrap && !m_width.fitsOnLine())
                 m_width.fitBelowFloats(m_lineInfo.isFirstLine());
 
@@ skipping 30 matching lines @@
                             wordMeasurement.width = charWidth;
                         }
                     }
                     // Didn't fit. Jump to the end unless there's still an opportunity to collapse whitespace.
                     if (m_ignoringSpaces || !m_collapseWhiteSpace || !m_currentCharacterIsSpace || !previousCharacterIsSpace) {
                         m_atEnd = true;
                         return false;
                     }
                 } else {
                     if (!betweenWords || (midWordBreak && !m_autoWrap))
-                        m_width.addUncommittedWidth(-additionalTmpW);
+                        m_width.addUncommittedWidth(-additionalTempWidth);
                     if (hyphenWidth) {
                         // Subtract the width of the soft hyphen out since we fit on a line.
                         m_width.addUncommittedWidth(-hyphenWidth);
                         hyphenWidth = 0;
                     }
                 }
             }
 
             if (c == '\n' && m_preservesNewline) {
                 if (!stoppedIgnoringSpaces && m_current.offset())
@@ skipping 75 matching lines @@
         nextCharacter(c, lastCharacter, secondToLastCharacter);
     }
 
     m_renderTextInfo.m_lineBreakIterator.setPriorContext(lastCharacter, secondToLastCharacter);
 
     wordMeasurements.grow(wordMeasurements.size() + 1);
     WordMeasurement& wordMeasurement = wordMeasurements.last();
     wordMeasurement.renderer = renderText;
 
     // IMPORTANT: current.m_pos is > length here!
-    float additionalTmpW = m_ignoringSpaces ? 0 : textWidth(renderText, lastSpace, m_current.offset() - lastSpace, font, m_width.currentWidth(), isFixedPitch, m_collapseWhiteSpace, &wordMeasurement.fallbackFonts);
+    float additionalTempWidth = m_ignoringSpaces ? 0 : textWidth(renderText, lastSpace, m_current.offset() - lastSpace, font, m_width.currentWidth(), isFixedPitch, m_collapseWhiteSpace, &wordMeasurement.fallbackFonts);
     wordMeasurement.startOffset = lastSpace;
     wordMeasurement.endOffset = m_current.offset();
-    wordMeasurement.width = m_ignoringSpaces ? 0 : additionalTmpW + wordSpacingForWordMeasurement;
-    additionalTmpW += lastSpaceWordSpacing;
-    m_width.addUncommittedWidth(additionalTmpW + inlineLogicalWidth(m_current.object(), !m_appliedStartWidth, m_includeEndWidth));
+    wordMeasurement.width = m_ignoringSpaces ? 0 : additionalTempWidth + wordSpacingForWordMeasurement;
+    additionalTempWidth += lastSpaceWordSpacing;
+
+    LayoutUnit inlineLogicalTempWidth = inlineLogicalWidth(m_current.object(), !m_appliedStartWidth, m_includeEndWidth);
+    m_width.addUncommittedWidth(additionalTempWidth + inlineLogicalTempWidth);
+
+    if (m_collapseWhiteSpace && m_currentCharacterIsSpace && additionalTempWidth)
+        m_width.setTrailingWhitespaceWidth(additionalTempWidth + inlineLogicalTempWidth);
+
     m_includeEndWidth = false;
 
     if (!m_width.fitsOnLine()) {
         if (!hyphenated && m_lineBreak.previousInSameNode() == softHyphen) {
             hyphenated = true;
             m_atEnd = true;
         }
     }
     return false;
 }
@@ skipping 72 matching lines @@
 
     if (style->textIndentType() == TextIndentHanging)
         shouldIndentText = shouldIndentText == IndentText ? DoNotIndentText : IndentText;
 
     return shouldIndentText;
 }
 
 }
 
 #endif // BreakingContextInlineHeaders_h