Add ContextRec param to SkShader::contextSize()

src/core/SkComposeShader.cpp

Index: src/core/SkComposeShader.cpp
diff --git a/src/core/SkComposeShader.cpp b/src/core/SkComposeShader.cpp
index 9e5e2c6a4947f99e53859d805266680bdf0c832c..46ff4019fc22f323649699146f3ba8695f34c3f6 100644
--- a/src/core/SkComposeShader.cpp
+++ b/src/core/SkComposeShader.cpp
@@ -30,8 +30,10 @@ SkComposeShader::~SkComposeShader() {
     fShaderA->unref();
 }
 
-size_t SkComposeShader::contextSize() const {
-    return sizeof(ComposeShaderContext) + fShaderA->contextSize() + fShaderB->contextSize();
+size_t SkComposeShader::contextSize(const ContextRec& rec) const {
+    return sizeof(ComposeShaderContext)
+        + fShaderA->contextSize(rec)
+        + fShaderB->contextSize(rec);
 }
 
 class SkAutoAlphaRestore {
@@ -75,7 +77,7 @@ template <typename T> void safe_call_destructor(T* obj) {
 
 SkShader::Context* SkComposeShader::onCreateContext(const ContextRec& rec, void* storage) const {
     char* aStorage = (char*) storage + sizeof(ComposeShaderContext);
-    char* bStorage = aStorage + fShaderA->contextSize();
+    char* bStorage = aStorage + fShaderA->contextSize(rec);
 
     // we preconcat our localMatrix (if any) with the device matrix
     // before calling our sub-shaders