Remove SkCanvas matrix ops return value.

src/core/SkDraw.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDraw.h"
 #include "SkBlitter.h"
 #include "SkBounder.h"
@@ skipping 1038 matching lines @@
                 origPaint.getRasterizer()) {
             SkPath* result = pathPtr;
 
             if (!pathIsMutable) {
                 result = &tmpPath;
                 pathIsMutable = true;
             }
             pathPtr->transform(*prePathMatrix, result);
             pathPtr = result;
         } else {
-            if (!tmpMatrix.setConcat(*matrix, *prePathMatrix)) {
-                // overflow
-                return;
-            }
+            tmpMatrix.setConcat(*matrix, *prePathMatrix);
             matrix = &tmpMatrix;
         }
     }
     // at this point we're done with prePathMatrix
     SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;)
 
     SkTCopyOnFirstWrite<SkPaint> paint(origPaint);
 
     {
         SkScalar coverage;
@@ skipping 199 matching lines @@
     if (fRC->isEmpty() ||
             bitmap.width() == 0 || bitmap.height() == 0 ||
             bitmap.colorType() == kUnknown_SkColorType) {
         return;
     }
 
     SkPaint paint(origPaint);
     paint.setStyle(SkPaint::kFill_Style);
 
     SkMatrix matrix;
-    if (!matrix.setConcat(*fMatrix, prematrix)) {
-        return;
-    }
+    matrix.setConcat(*fMatrix, prematrix);
 
     if (clipped_out(matrix, *fRC, bitmap.width(), bitmap.height())) {
         return;
     }
 
     if (fBounder && just_translate(matrix, bitmap)) {
         SkIRect ir;
         int32_t ix = SkScalarRoundToInt(matrix.getTranslateX());
         int32_t iy = SkScalarRoundToInt(matrix.getTranslateY());
         ir.set(ix, iy, ix + bitmap.width(), iy + bitmap.height());
@@ skipping 1092 matching lines @@
     m.reset();
     m.set(0, pts[index1].fX - pts[index0].fX);
     m.set(1, pts[index2].fX - pts[index0].fX);
     m.set(2, pts[index0].fX);
     m.set(3, pts[index1].fY - pts[index0].fY);
     m.set(4, pts[index2].fY - pts[index0].fY);
     m.set(5, pts[index0].fY);
     if (!m.invert(&im)) {
         return false;
     }
-    return fDstToUnit.setConcat(im, this->getTotalInverse());
+    fDstToUnit.setConcat(im, this->getTotalInverse());
+    return true;
 }
 
 #include "SkColorPriv.h"
 #include "SkComposeShader.h"
 
 static int ScalarTo256(SkScalar v) {
     int scale = SkScalarToFixed(v) >> 8;
     if (scale < 0) {
         scale = 0;
     }
@@ skipping 397 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }