Added support for CSS filters to the software compositor.

BUG=160302


Review URL: https://chromiumcodereview.appspot.com/11362235

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@167747 0039d316-1c4b-4281-b951-d872f2087c98

cc/software_renderer.cc

@@ -268,6 +268,11 @@ void SoftwareRenderer::drawRenderPassQuad(const DrawingFrame& frame, const Rende
     if (!contentTexture || !contentTexture->id())
         return;
 
+    const RenderPass* renderPass = frame.renderPassesById->get(quad->renderPassId());
+    DCHECK(renderPass);
+    if (!renderPass)
+        return;
+
     DCHECK(isSoftwareResource(contentTexture->id()));
     ResourceProvider::ScopedReadLockSoftware lock(m_resourceProvider, contentTexture->id());
 
@@ -287,6 +292,10 @@ void SoftwareRenderer::drawRenderPassQuad(const DrawingFrame& frame, const Rende
     shader->setLocalMatrix(contentMat);
     m_skCurrentPaint.setShader(shader);
 
+    SkImageFilter* filter = renderPass->filter();
+    if (filter)
+        m_skCurrentPaint.setImageFilter(filter);
+
     if (quad->maskResourceId()) {
         ResourceProvider::ScopedReadLockSoftware maskLock(m_resourceProvider, quad->maskResourceId());