Remove Gradient point/radius setters

These are only called from CSSGradientValue to adjust the points/radii
immediately after Gradient instantiation.

Refactor CSSGradientValue to perform the adjustment before constructing
the Gradient object.  No functional changes.

BUG=614368
R=schenney@chromium.org,fs@opera.com

Review-Url: https://codereview.chromium.org/2754703003
Cr-Commit-Position: refs/heads/master@{#457498}

third_party/WebKit/Source/core/css/CSSGradientValue.h

@@ -114,6 +114,8 @@ class CSSGradientValue : public CSSImageGeneratorValue {
 
   DECLARE_TRACE_AFTER_DISPATCH();
 
+  struct GradientDesc;
+
  protected:
   CSSGradientValue(ClassType classType,
                    CSSGradientRepeat repeat,
@@ -123,10 +125,10 @@ class CSSGradientValue : public CSSImageGeneratorValue {
         m_gradientType(gradientType),
         m_repeating(repeat == Repeating) {}
 
-  void addStops(Gradient*,
+  void addStops(GradientDesc&,
                 const CSSToLengthConversionData&,
                 const LayoutObject&);
-  void addDeprecatedStops(Gradient*, const LayoutObject&);
+  void addDeprecatedStops(GradientDesc&, const LayoutObject&);
 
   // Resolve points/radii to front end values.
   FloatPoint computeEndPoint(CSSValue*,

third_party/WebKit/Source/platform/graphics/Gradient.h

@@ -96,37 +96,9 @@ class PLATFORM_EXPORT Gradient : public RefCounted<Gradient> {
   const FloatPoint& p0() const { return m_p0; }
   const FloatPoint& p1() const { return m_p1; }
 
-  void setP0(const FloatPoint& p) {
-    if (m_p0 == p)
-      return;
-
-    m_p0 = p;
-  }
-
-  void setP1(const FloatPoint& p) {
-    if (m_p1 == p)
-      return;
-
-    m_p1 = p;
-  }
-
   float startRadius() const { return m_r0; }
   float endRadius() const { return m_r1; }
 
-  void setStartRadius(float r) {
-    if (m_r0 == r)
-      return;
-
-    m_r0 = r;
-  }
-
-  void setEndRadius(float r) {
-    if (m_r1 == r)
-      return;
-
-    m_r1 = r;
-  }
-
   void applyToFlags(PaintFlags&, const SkMatrix& localMatrix);
 
   GradientSpreadMethod spreadMethod() const { return m_spreadMethod; }