Migrate most of cc/ from WebKit::WebTransformationMatrix to gfx::Transform

cc/layer_tree_host_impl.cc

Index: cc/layer_tree_host_impl.cc
diff --git a/cc/layer_tree_host_impl.cc b/cc/layer_tree_host_impl.cc
index a8a3faae276bbe07ce031349488be941567726af..3f530ec0c78dda5e3f978a7f4e63ae091447a4cd 100644
--- a/cc/layer_tree_host_impl.cc
+++ b/cc/layer_tree_host_impl.cc
@@ -36,7 +36,7 @@
 #include "ui/gfx/size_conversions.h"
 #include "ui/gfx/vector2d_conversions.h"
 
-using WebKit::WebTransformationMatrix;
+using gfx::Transform;
 
 namespace {
 
@@ -134,16 +134,16 @@ gfx::Vector2dF PinchZoomViewport::applyScroll(const gfx::Vector2dF& delta)
     return overflow;
 }
 
-WebTransformationMatrix PinchZoomViewport::implTransform(bool pageScalePinchZoomEnabled) const
+Transform PinchZoomViewport::implTransform(bool pageScalePinchZoomEnabled) const
 {
-    WebTransformationMatrix transform;
-    transform.scale(m_pageScaleDelta);
+    Transform transform;
+    transform.PreconcatScale(m_pageScaleDelta, m_pageScaleDelta);
 
     // If the pinch state is applied in the impl, then push it to the
     // impl transform, otherwise the scale is handled by WebCore.
     if (pageScalePinchZoomEnabled) {
-        transform.scale(m_pageScaleFactor);
-        transform.translate(-m_pinchViewportScrollDelta.x(),
+        transform.PreconcatScale(m_pageScaleFactor, m_pageScaleFactor);
+        transform.PreconcatTranslate(-m_pinchViewportScrollDelta.x(),
                             -m_pinchViewportScrollDelta.y());
     }
 
@@ -445,7 +445,7 @@ static void appendQuadsToFillScreen(RenderPass* targetRenderPass, LayerImpl* roo
     // doesn't have any bounds and so can't generate this itself.
     // FIXME: Make the gutter quads generated by the solid color layer (make it smarter about generating quads to fill unoccluded areas).
 
-    DCHECK(rootLayer->screenSpaceTransform().isInvertible());
+    DCHECK(rootLayer->screenSpaceTransform().IsInvertible());
 
     gfx::Rect rootTargetRect = rootLayer->renderSurface()->contentRect();
     float opacity = 1;
@@ -456,7 +456,7 @@ static void appendQuadsToFillScreen(RenderPass* targetRenderPass, LayerImpl* roo
                             opacity);
 
     AppendQuadsData appendQuadsData;
-    WebTransformationMatrix transformToLayerSpace = rootLayer->screenSpaceTransform().inverse();
+    Transform transformToLayerSpace = MathUtil::inverse(rootLayer->screenSpaceTransform());
     for (Region::Iterator fillRects(fillRegion); fillRects.has_rect(); fillRects.next()) {
         // The root layer transform is composed of translations and scales only,
         // no perspective, so mapping is sufficient.
@@ -1192,8 +1192,8 @@ static gfx::Vector2dF scrollLayerWithViewportSpaceDelta(PinchZoomViewport* viewp
 {
     // Layers with non-invertible screen space transforms should not have passed the scroll hit
     // test in the first place.
-    DCHECK(layerImpl.screenSpaceTransform().isInvertible());
-    WebTransformationMatrix inverseScreenSpaceTransform = layerImpl.screenSpaceTransform().inverse();
+    DCHECK(layerImpl.screenSpaceTransform().IsInvertible());
+    Transform inverseScreenSpaceTransform = MathUtil::inverse(layerImpl.screenSpaceTransform());
 
     gfx::PointF screenSpacePoint = gfx::ScalePoint(viewportPoint, scaleFromViewportToScreenSpace);
 
@@ -1455,7 +1455,7 @@ scoped_ptr<ScrollAndScaleSet> LayerTreeHostImpl::processScrollDeltas()
     return scrollInfo.Pass();
 }
 
-WebTransformationMatrix LayerTreeHostImpl::implTransform() const
+Transform LayerTreeHostImpl::implTransform() const
 {
     return m_pinchZoomViewport.implTransform(m_settings.pageScalePinchZoomEnabled);
 }