Reland the 4x -> 1x allocation from "4x allocation in PipeController is probably overkill."

BUG=372671
R=mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/283933002

git-svn-id: http://skia.googlecode.com/svn/trunk@14734 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pipe/utils/SamplePipeControllers.cpp b/src/pipe/utils/SamplePipeControllers.cpp
index 1e25cb6..ea2c39c 100644
--- a/src/pipe/utils/SamplePipeControllers.cpp
+++ b/src/pipe/utils/SamplePipeControllers.cpp
@@ -25,7 +25,7 @@
 
 void* PipeController::requestBlock(size_t minRequest, size_t *actual) {
     sk_free(fBlock);
-    fBlockSize = minRequest * 4;
+    fBlockSize = minRequest;
     fBlock = sk_malloc_throw(fBlockSize);
     fBytesWritten = 0;
     *actual = fBlockSize;