Update RenderImage when the image src is cleared

Source/core/rendering/RenderImage.cpp

Index: Source/core/rendering/RenderImage.cpp
diff --git a/Source/core/rendering/RenderImage.cpp b/Source/core/rendering/RenderImage.cpp
index 81799184d4c68016008e3c5cc3e5ffe7b919a00f..9c17c6ee3919623cfe2e2d632887dde0b267930a 100644
--- a/Source/core/rendering/RenderImage.cpp
+++ b/Source/core/rendering/RenderImage.cpp
@@ -159,7 +159,7 @@ void RenderImage::imageChanged(WrappedImagePtr newImage, const IntRect* rect)
     if (!m_imageResource)
         return;
 
-    if (newImage != m_imageResource->imagePtr() || !newImage)
+    if (newImage != m_imageResource->imagePtr())
         return;
 
     if (!m_didIncrementVisuallyNonEmptyPixelCount) {
@@ -171,7 +171,7 @@ void RenderImage::imageChanged(WrappedImagePtr newImage, const IntRect* rect)
     bool imageSizeChanged = false;
 
     // Set image dimensions, taking into account the size of the alt text.
-    if (m_imageResource->errorOccurred()) {
+    if (m_imageResource->errorOccurred() || !newImage) {
         if (!m_altText.isEmpty() && document()->hasPendingStyleRecalc()) {
             ASSERT(node());
             if (node()) {
@@ -190,7 +190,7 @@ bool RenderImage::updateIntrinsicSizeIfNeeded(const LayoutSize& newSize, bool im
 {
     if (newSize == intrinsicSize() && !imageSizeChanged)
         return false;
-    if (m_imageResource->errorOccurred())
+    if (m_imageResource->errorOccurred() || !m_imageResource->hasImage())

[spartha, 2013/07/31 09:58:07]

This change was missed as the test case was deficient. This ensures alttext if
present to be rendered. Have updated the testcase too.

         return imageSizeChanged;
     setIntrinsicSize(newSize);
     return true;