Adding support for per vertex opacity on textured layer

cc/gl_renderer.h

Index: cc/gl_renderer.h
diff --git a/cc/gl_renderer.h b/cc/gl_renderer.h
index 4cfdfc06a9d4fc7e80ae366d86cba5cbef2fa6b3..55c6806d707efc333e3d53d2df18198a4a6731db 100644
--- a/cc/gl_renderer.h
+++ b/cc/gl_renderer.h
@@ -162,9 +162,9 @@ private:
     typedef ProgramBinding<VertexShaderQuad, FragmentShaderRGBATexAlphaMaskAA> RenderPassMaskProgramAA;
 
     // Texture shaders.
-    typedef ProgramBinding<VertexShaderPosTexTransform, FragmentShaderRGBATexAlpha> TextureProgram;
-    typedef ProgramBinding<VertexShaderPosTexTransform, FragmentShaderRGBATexFlipAlpha> TextureProgramFlip;
-    typedef ProgramBinding<VertexShaderPosTexTransform, FragmentShaderRGBATexRectAlpha> TextureIOSurfaceProgram;
+    typedef ProgramBinding<VertexShaderPosTexTransform, FragmentShaderRGBATexVaryingAlpha> TextureProgram;
+    typedef ProgramBinding<VertexShaderPosTexTransform, FragmentShaderRGBATexFlipVaryingAlpha> TextureProgramFlip;
+    typedef ProgramBinding<VertexShaderPosTexTransform, FragmentShaderRGBATexRectVaryingAlpha> TextureIOSurfaceProgram;
 
     // Video shaders.
     typedef ProgramBinding<VertexShaderVideoTransform, FragmentShaderOESImageExternal> VideoStreamTextureProgram;