Make it possible to draw multiple paths at once to a draw target

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 00791be054a1e55ceb7c1c36c15c2a465677c7b9..e8ccc26b1d8c9a0e1668f6e8323a3341b65ba9ce 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -337,6 +337,7 @@ protected:
         kDrawTriangles_DrawType,
         kStencilPath_DrawType,
         kDrawPath_DrawType,
+        kDrawPaths_DrawType,
     };
 
     DrawType PrimTypeToDrawType(GrPrimitiveType type) {
@@ -438,6 +439,8 @@ private:
     // overridden by backend-specific derived class to perform the path stenciling.
     virtual void onGpuStencilPath(const GrPath*, SkPath::FillType) = 0;
     virtual void onGpuDrawPath(const GrPath*, SkPath::FillType) = 0;
+    virtual void onGpuDrawPaths(size_t, const GrPath**, const SkMatrix*,
+                                SkPath::FillType, SkStrokeRec::Style) = 0;
 
     // overridden by backend-specific derived class to perform flush
     virtual void onForceRenderTargetFlush() = 0;
@@ -483,6 +486,9 @@ private:
     virtual void onStencilPath(const GrPath*, SkPath::FillType) SK_OVERRIDE;
     virtual void onDrawPath(const GrPath*, SkPath::FillType,
                             const GrDeviceCoordTexture* dstCopy) SK_OVERRIDE;
+    virtual void onDrawPaths(size_t, const GrPath**, const SkMatrix*,
+                             SkPath::FillType, SkStrokeRec::Style,
+                             const GrDeviceCoordTexture* dstCopy) SK_OVERRIDE;
 
     // readies the pools to provide vertex/index data.
     void prepareVertexPool();