Updated WebKit to 45d1c9149ef8940081fa8dd35854d2b95ebaf3cd

Integrated changes:

|| <https://webkit.org/b/6274> || text repainting does not account for glyphs which draw outside the typographic bounds of the font ||
|| <https://webkit.org/b/40840> || [Qt] Symbian builds in release sometimes try to link with the debug JavaScriptCore static lib. ||
|| <https://webkit.org/b/40620> || [Qt] Get rid of the the unused imageSize of ImageDecoderQt::internalHandleCurrentImage() ||
|| <https://webkit.org/b/37292> || http://trac.webkit.org/changeset/57215 caused perf regressions ||
|| <https://webkit.org/b/40077> || [Qt] Implement the simple font code path. ||
|| <https://webkit.org/b/40910> || [Qt] Avoid unnecessary image conversion in RGBA32Buffer::zeroFill() ||
|| <https://webkit.org/b/40797> || [Qt] Decode images directly to QPixmap ||
|| <https://webkit.org/b/36510> || [chromium] use integral glyph widths ||

2 files changed, 25 insertions, 13 deletions

diff --git a/src/3rdparty/webkit/WebCore/platform/image-decoders/ImageDecoder.h b/src/3rdparty/webkit/WebCore/platform/image-decoders/ImageDecoder.h
index d526e5e..1074753 100644
--- a/src/3rdparty/webkit/WebCore/platform/image-decoders/ImageDecoder.h
+++ b/src/3rdparty/webkit/WebCore/platform/image-decoders/ImageDecoder.h
@@ -40,6 +40,7 @@
 #if PLATFORM(SKIA)
 #include "NativeImageSkia.h"
 #elif PLATFORM(QT)
+#include <QPixmap>
 #include <QImage>
 #endif
 
@@ -130,8 +131,7 @@ namespace WebCore {
         }
 
 #if PLATFORM(QT)
-        void setDecodedImage(const QImage& image);
-        QImage decodedImage() const { return m_image; }
+        void setPixmap(const QPixmap& pixmap);
 #endif
 
     private:
@@ -143,6 +143,8 @@ namespace WebCore {
 #if PLATFORM(SKIA)
             return m_bitmap.getAddr32(x, y);
 #elif PLATFORM(QT)
+            m_image = m_pixmap.toImage();
+            m_pixmap = QPixmap();
             return reinterpret_cast<QRgb*>(m_image.scanLine(y)) + x;
 #else
             return m_bytes.data() + (y * width()) + x;
@@ -168,6 +170,7 @@ namespace WebCore {
 #if PLATFORM(SKIA)
         NativeImageSkia m_bitmap;
 #elif PLATFORM(QT)
+        mutable QPixmap m_pixmap;
         mutable QImage m_image;
         bool m_hasAlpha;
         IntSize m_size;
diff --git a/src/3rdparty/webkit/WebCore/platform/image-decoders/qt/RGBA32BufferQt.cpp b/src/3rdparty/webkit/WebCore/platform/image-decoders/qt/RGBA32BufferQt.cpp
index b2e5e17..044515a 100644
--- a/src/3rdparty/webkit/WebCore/platform/image-decoders/qt/RGBA32BufferQt.cpp
+++ b/src/3rdparty/webkit/WebCore/platform/image-decoders/qt/RGBA32BufferQt.cpp
@@ -57,6 +57,7 @@ RGBA32Buffer& RGBA32Buffer::operator=(const RGBA32Buffer& other)
 
 void RGBA32Buffer::clear()
 {
+    m_pixmap = QPixmap();
     m_image = QImage();
     m_status = FrameEmpty;
     // NOTE: Do not reset other members here; clearFrameBufferCache()
@@ -67,7 +68,11 @@ void RGBA32Buffer::clear()
 
 void RGBA32Buffer::zeroFill()
 {
-    m_image.fill(0);
+    if (m_pixmap.isNull() && !m_image.isNull()) {
+        m_pixmap = QPixmap(m_image.width(), m_image.height());
+        m_image = QImage();
+    }
+    m_pixmap.fill(QColor(0, 0, 0, 0));
 }
 
 void RGBA32Buffer::copyBitmapData(const RGBA32Buffer& other)
@@ -76,6 +81,7 @@ void RGBA32Buffer::copyBitmapData(const RGBA32Buffer& other)
         return;
 
     m_image = other.m_image;
+    m_pixmap = other.m_pixmap;
     m_size = other.m_size;
     m_hasAlpha = other.m_hasAlpha;
 }
@@ -87,8 +93,9 @@ bool RGBA32Buffer::setSize(int newWidth, int newHeight)
     ASSERT(width() == 0 && height() == 0);
 
     m_size = IntSize(newWidth, newHeight);
-    m_image = QImage(newWidth, newHeight, QImage::Format_ARGB32_Premultiplied);
-    if (m_image.isNull())
+    m_image = QImage();
+    m_pixmap = QPixmap(newWidth, newHeight);
+    if (m_pixmap.isNull())
         return false;
 
     // Zero the image.
@@ -99,10 +106,11 @@ bool RGBA32Buffer::setSize(int newWidth, int newHeight)
 
 QPixmap* RGBA32Buffer::asNewNativeImage() const
 {
-    QPixmap pix = QPixmap::fromImage(m_image);
-    m_image = QImage();
-
-    return new QPixmap(pix);
+    if (m_pixmap.isNull() && !m_image.isNull()) {
+        m_pixmap = QPixmap::fromImage(m_image);
+        m_image = QImage();
+    }
+    return new QPixmap(m_pixmap);
 }
 
 bool RGBA32Buffer::hasAlpha() const
@@ -121,11 +129,12 @@ void RGBA32Buffer::setStatus(FrameStatus status)
 }
 
 // The image must not have format 8888 pre multiplied...
-void RGBA32Buffer::setDecodedImage(const QImage& image)
+void RGBA32Buffer::setPixmap(const QPixmap& pixmap)
 {
-    m_image = image;
-    m_size = image.size();
-    m_hasAlpha = image.hasAlphaChannel();
+    m_pixmap = pixmap;
+    m_image = QImage();
+    m_size = pixmap.size();
+    m_hasAlpha = pixmap.hasAlphaChannel();
 }
 
 int RGBA32Buffer::width() const