Add direct getter for GrCaps to GrContext.

src/gpu/GrClipMaskManager.cpp

Index: src/gpu/GrClipMaskManager.cpp
diff --git a/src/gpu/GrClipMaskManager.cpp b/src/gpu/GrClipMaskManager.cpp
index 9279ba5450b8c2c03ea6f15bc4a74d3c0e2398e8..f8e045ba7f8f41f6d96a625bff3b6b5daea8f59a 100644
--- a/src/gpu/GrClipMaskManager.cpp
+++ b/src/gpu/GrClipMaskManager.cpp
@@ -489,7 +489,7 @@ GrTexture* GrClipMaskManager::createTempMask(int width, int height) {
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = width;
     desc.fHeight = height;
-    if (this->getContext()->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
+    if (this->getContext()->caps()->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
         desc.fConfig = kAlpha_8_GrPixelConfig;
     } else {
         desc.fConfig = kRGBA_8888_GrPixelConfig;
@@ -526,7 +526,8 @@ GrTexture* GrClipMaskManager::allocMaskTexture(int32_t elementsGenID,
     desc.fWidth = clipSpaceIBounds.width();
     desc.fHeight = clipSpaceIBounds.height();
     desc.fConfig = kRGBA_8888_GrPixelConfig;
-    if (willUpload || this->getContext()->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
+    if (willUpload ||
+        this->getContext()->caps()->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
         // We would always like A8 but it isn't supported on all platforms
         desc.fConfig = kAlpha_8_GrPixelConfig;
     }