Re-land: cc: Added antialiasing support for solid color layers

cc/shader.h

Index: cc/shader.h
diff --git a/cc/shader.h b/cc/shader.h
index 6ae060d7f2ab1ae987b54e5fa39ed65572c9da66..1923e9e5713ebcb6725c7df356990c8d8a0c4a14 100644
--- a/cc/shader.h
+++ b/cc/shader.h
@@ -323,12 +323,27 @@ public:
     std::string getShaderString() const;
 
     void init(WebKit::WebGraphicsContext3D*, unsigned program, bool usingBindUniform, int* baseUniformIndex);
+    int edgeLocation() const { return -1; }
     int colorLocation() const { return m_colorLocation; }
 
 private:
     int m_colorLocation;
 };
 
+class FragmentShaderColorAA {
+public:
+    FragmentShaderColorAA();
+    std::string getShaderString() const;
+
+    void init(WebKit::WebGraphicsContext3D*, unsigned program, bool usingBindUniform, int* baseUniformIndex);
+    int edgeLocation() const { return m_edgeLocation; }
+    int colorLocation() const { return m_colorLocation; }
+
+private:
+    int m_edgeLocation;
+    int m_colorLocation;
+};
+
 class FragmentShaderCheckerboard {
 public:
     FragmentShaderCheckerboard();