Make platform/heap to use USING_FAST_MALLOC.

third_party/WebKit/Source/web/WebKit.cpp

Index: third_party/WebKit/Source/web/WebKit.cpp
diff --git a/third_party/WebKit/Source/web/WebKit.cpp b/third_party/WebKit/Source/web/WebKit.cpp
index a880884b7115215699199ae3f89ae644108fc696..d4933531f4d5b14cbaea047a404a40119f46f13b 100644
--- a/third_party/WebKit/Source/web/WebKit.cpp
+++ b/third_party/WebKit/Source/web/WebKit.cpp
@@ -163,10 +163,11 @@ void initializeWithoutV8(Platform* platform)
     ASSERT(!s_webKitInitialized);
     s_webKitInitialized = true;
 
+    WTF::Partitions::initialize(histogramEnumerationFunction);

[haraken, 2016/01/20 10:52:27]

Shall we make this change separately? (i.e., call Partition::initialize earlier
than Platform::initialize)

[tasak, 2016/01/21 04:37:46]

Sure.
I created https://codereview.chromium.org/1619443002.

     ASSERT(platform);
     Platform::initialize(platform);
 
-    WTF::initialize(currentTimeFunction, monotonicallyIncreasingTimeFunction, histogramEnumerationFunction, adjustAmountOfExternalAllocatedMemory);
+    WTF::initialize(currentTimeFunction, monotonicallyIncreasingTimeFunction, adjustAmountOfExternalAllocatedMemory);
     WTF::initializeMainThread(callOnMainThreadFunction);
     Heap::init();