Fix uninitialized read in the SimpleCache tests.

DiskCacheEntryTest.SimpleCacheOptimisticWriteReleases did not initialize
its buffer. It was immaterial to the test, but less so to valgrind.

R=zhaoqin@chromium.org
BUG=245952

Review URL: https://chromiumcodereview.appspot.com/16306003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203887 0039d316-1c4b-4281-b951-d872f2087c98

net/disk_cache/entry_unittest.cc

@@ -2853,6 +2853,7 @@ TEST_F(DiskCacheEntryTest, SimpleCacheOptimisticWriteReleases) {
   const int kWriteSize = 512;
   scoped_refptr<net::IOBuffer> buffer1(new net::IOBuffer(kWriteSize));
   EXPECT_TRUE(buffer1->HasOneRef());
+  CacheTestFillBuffer(buffer1->data(), kWriteSize, false);
 
   // An optimistic write happens only when there is an empty queue of pending
   // operations. To ensure the queue is empty, we issue a write and wait until

tools/valgrind/memcheck/suppressions.txt

@@ -7352,21 +7352,6 @@ fun:_ZN7content21RenderViewHostManager8NavigateERKNS_19NavigationEntryImplE
    fun:_ZN7content21ContentMainRunnerImpl3RunEv
    fun:_ZN7content11ContentMainEiPPKcPNS_19ContentMainDelegateE
 }
-{
-   bug_245952a
-   Memcheck:Uninitialized
-   fun:crc32_little
-   fun:MOZ_Z_crc32
-   fun:_ZN10disk_cache15SimpleEntryImpl17WriteDataInternalEiiPN3net8IOBufferEiRKN4base8CallbackIFviEEEb
-}
-{
-   bug_245952b
-   Memcheck:Param
-   pwrite64(buf)
-   obj:/lib/x86_64-linux-gnu/libpthread-2.15.so
-   fun:_ZN4base17WritePlatformFileEilPKci
-   fun:_ZN10disk_cache22SimpleSynchronousEntry9WriteDataEiiPN3net8IOBufferEibPi
-}
 {
    bug_245092a
    Memcheck:Leak