Revert of SkStringPrintf and SkString::printf now are no longer limted by a static buffer

tests/StringTest.cpp

Index: tests/StringTest.cpp
diff --git a/tests/StringTest.cpp b/tests/StringTest.cpp
index 0e71c2b98897efb5bcd97d5fa7d270ea6597b1ae..9e41c48c845d689c740d1544c731a1652750f44c 100644
--- a/tests/StringTest.cpp
+++ b/tests/StringTest.cpp
@@ -147,13 +147,6 @@
     a.set("");
     a.appendU64(0x0000000001000000ULL, 15);
     REPORTER_ASSERT(reporter, a.equals("000000016777216"));
-
-    a.printf("%i", 0);
-    REPORTER_ASSERT(reporter, a.equals("0"));
-    a.printf("%g", 3.14);
-    REPORTER_ASSERT(reporter, a.equals("3.14"));
-    a.printf("hello %s", "skia");
-    REPORTER_ASSERT(reporter, a.equals("hello skia"));
 
     static const struct {
         SkScalar    fValue;
@@ -192,25 +185,6 @@
     REPORTER_ASSERT(reporter, buffer[19] == 0);
     REPORTER_ASSERT(reporter, buffer[20] == 'a');
 
-    REPORTER_ASSERT(reporter, SkStringPrintf("%i", 0).equals("0"));
-
-    a = SkStringPrintf("%2000s", " ");
-    REPORTER_ASSERT(reporter, a.size() == 2000);
-    for (size_t i = 0; i < a.size(); ++i) {
-        if (a[i] != ' ') {
-            ERRORF(reporter, "SkStringPrintf fail: a[%d] = '%c'", i, a[i]);
-            break;
-        }
-    }
-    a.reset();
-    a.printf("%2000s", " ");
-    REPORTER_ASSERT(reporter, a.size() == 2000);
-    for (size_t i = 0; i < a.size(); ++i) {
-        if (a[i] != ' ') {
-            ERRORF(reporter, "SkStringPrintf fail: a[%d] = '%c'", i, a[i]);
-            break;
-        }
-    }
 }
 
 DEF_TEST(String_SkStrSplit, r) {