Revert of getComputedStyle should handle over-constrained properties.…

… (patchset #7 id:100001 of https://codereview.chromium.org/1988813002/ )

Reason for revert:
Other vendors didn't implement this yet. And work with the others to either get all to fix or to change the spec.

BUG=614198

Original issue's description:
> getComputedStyle should handle over-constrained properties.
>
> If neither 'left' nor 'right' is 'auto', the position is over-constrained,
> and one of them has to be ignored. If 'direction' property of the
> containing block is 'ltr', the value of 'left' wins and 'right'
> becomes -'left'. If 'direction' of the containing block is 'rtl',
> 'right' wins and 'left' is ignored. Detail is described by
> https://www.w3.org/TR/2011/REC-CSS2-20110607/visuren.html#relative-positioning
>
> BUG=601118
>
> Committed: https://crrev.com/c8291dea8bfa84ab9a3220fb9f57eb059e913a05
> Cr-Commit-Position: refs/heads/master@{#394780}

TBR=mstensho@opera.com,alancutter@chromium.org,rune@opera.com,eae@chromium.org,timloh@chromium.org
BUG=601118

Review-Url: https://codereview.chromium.org/2016913003
Cr-Commit-Position: refs/heads/master@{#396470}
(cherry picked from commit 9835ebf)

Review URL: https://codereview.chromium.org/2025523002 .

Cr-Commit-Position: refs/branch-heads/2743@{#116}
Cr-Branched-From: 2b3ae3b-refs/heads/master@{#394939}

third_party/WebKit/LayoutTests/fast/css/computed-offset-with-zoom-expected.txt

@@ -1,38 +1,38 @@
 PASS window.getComputedStyle(fixedElement).top is '100px'
-PASS window.getComputedStyle(fixedElement).right is '-100px'
-PASS window.getComputedStyle(fixedElement).bottom is '-100px'
+PASS window.getComputedStyle(fixedElement).right is '100px'
+PASS window.getComputedStyle(fixedElement).bottom is '100px'
 PASS window.getComputedStyle(fixedElement).left is '100px'
 PASS window.getComputedStyle(percentageElement).top is '50px'
 PASS window.getComputedStyle(percentageElement).right is '100px'
 PASS window.getComputedStyle(percentageElement).bottom is '50px'
 PASS window.getComputedStyle(percentageElement).left is '100px'
 PASS window.getComputedStyle(viewportElement).top is '60px'
-PASS window.getComputedStyle(viewportElement).right is '-80px'
-PASS window.getComputedStyle(viewportElement).bottom is '-60px'
+PASS window.getComputedStyle(viewportElement).right is '80px'
+PASS window.getComputedStyle(viewportElement).bottom is '60px'
 PASS window.getComputedStyle(viewportElement).left is '80px'
 PASS window.getComputedStyle(fixedElement).top is '100px'
-PASS window.getComputedStyle(fixedElement).right is '-100px'
-PASS window.getComputedStyle(fixedElement).bottom is '-100px'
+PASS window.getComputedStyle(fixedElement).right is '100px'
+PASS window.getComputedStyle(fixedElement).bottom is '100px'
 PASS window.getComputedStyle(fixedElement).left is '100px'
 PASS window.getComputedStyle(percentageElement).top is '50px'
 PASS window.getComputedStyle(percentageElement).right is '100px'
 PASS window.getComputedStyle(percentageElement).bottom is '50px'
 PASS window.getComputedStyle(percentageElement).left is '100px'
 PASS window.getComputedStyle(viewportElement).top is '60px'
-PASS window.getComputedStyle(viewportElement).right is '-80px'
-PASS window.getComputedStyle(viewportElement).bottom is '-60px'
+PASS window.getComputedStyle(viewportElement).right is '80px'
+PASS window.getComputedStyle(viewportElement).bottom is '60px'
 PASS window.getComputedStyle(viewportElement).left is '80px'
 PASS window.getComputedStyle(fixedElement).top is '100px'
-PASS window.getComputedStyle(fixedElement).right is '-100px'
-PASS window.getComputedStyle(fixedElement).bottom is '-100px'
+PASS window.getComputedStyle(fixedElement).right is '100px'
+PASS window.getComputedStyle(fixedElement).bottom is '100px'
 PASS window.getComputedStyle(fixedElement).left is '100px'
 PASS window.getComputedStyle(percentageElement).top is '50px'
 PASS window.getComputedStyle(percentageElement).right is '100px'
 PASS window.getComputedStyle(percentageElement).bottom is '50px'
 PASS window.getComputedStyle(percentageElement).left is '100px'
 PASS window.getComputedStyle(viewportElement).top is '60px'
-PASS window.getComputedStyle(viewportElement).right is '-80px'
-PASS window.getComputedStyle(viewportElement).bottom is '-60px'
+PASS window.getComputedStyle(viewportElement).right is '80px'
+PASS window.getComputedStyle(viewportElement).bottom is '60px'
 PASS window.getComputedStyle(viewportElement).left is '80px'
 PASS successfullyParsed is true
 

third_party/WebKit/LayoutTests/fast/css/computed-offset-with-zoom.html

@@ -53,12 +53,10 @@
                     document.body.style.zoom = zoomLevel;
                     var windowWidth = "'" + (window.innerWidth / 10) + "px'";
                     var windowHeight = "'" + (window.innerHeight / 10) + "px'";
-                    var windowMinusWidth = "'-" + (window.innerWidth / 10) + "px'";
-                    var windowMinusHeight = "'-" + (window.innerHeight / 10) + "px'";
 
                     shouldBe("window.getComputedStyle(fixedElement).top", "'100px'");
-                    shouldBe("window.getComputedStyle(fixedElement).right", "'-100px'");
-                    shouldBe("window.getComputedStyle(fixedElement).bottom", "'-100px'");
+                    shouldBe("window.getComputedStyle(fixedElement).right", "'100px'");
+                    shouldBe("window.getComputedStyle(fixedElement).bottom", "'100px'");
                     shouldBe("window.getComputedStyle(fixedElement).left", "'100px'");
 
                     shouldBe("window.getComputedStyle(percentageElement).top", "'50px'");
@@ -67,8 +65,8 @@
                     shouldBe("window.getComputedStyle(percentageElement).left", "'100px'");
 
                     shouldBe("window.getComputedStyle(viewportElement).top", windowHeight);
-                    shouldBe("window.getComputedStyle(viewportElement).right", windowMinusWidth);
-                    shouldBe("window.getComputedStyle(viewportElement).bottom", windowMinusHeight);
+                    shouldBe("window.getComputedStyle(viewportElement).right", windowWidth);
+                    shouldBe("window.getComputedStyle(viewportElement).bottom", windowHeight);
                     shouldBe("window.getComputedStyle(viewportElement).left", windowWidth);
             }
             test(0.5);

third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp

@@ -247,14 +247,6 @@ static CSSValue* valueForPositionOffset(const ComputedStyle& style, CSSPropertyI
     if (offset.isAuto())
         return cssValuePool().createIdentifierValue(CSSValueAuto);
 
-    if (layoutObject) {
-        if (!opposite.isAuto() && layoutObject->isInFlowPositioned()) {
-            LayoutBlock* container = layoutObject->containingBlock();
-            bool ltr = container->style()->isLeftToRightDirection();
-            if ((propertyID == CSSPropertyLeft && !ltr) || (propertyID == CSSPropertyRight && ltr) || (propertyID == CSSPropertyBottom))
-                return zoomAdjustedPixelValue(-opposite.pixels(), style);
-        }
-    }
     return zoomAdjustedPixelValueForLength(offset, style);
 }