Make some functions that are hit during renderer startup available for inlining

src/heap/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <vector>
 
@@ skipping 1988 matching lines @@
   MUST_USE_RESULT AllocationResult
   AllocateBytecodeArray(int length, const byte* raw_bytecodes, int frame_size,
                         int parameter_count, FixedArray* constant_pool);
 
   MUST_USE_RESULT AllocationResult CopyCode(Code* code);
 
   MUST_USE_RESULT AllocationResult
   CopyBytecodeArray(BytecodeArray* bytecode_array);
 
   // Allocates a fixed array initialized with undefined values
-  MUST_USE_RESULT AllocationResult
-  AllocateFixedArray(int length, PretenureFlag pretenure = NOT_TENURED);
+  MUST_USE_RESULT inline AllocationResult AllocateFixedArray(
+      int length, PretenureFlag pretenure = NOT_TENURED);
 
   MUST_USE_RESULT AllocationResult AllocateSmallOrderedHashSet(
       int length, PretenureFlag pretenure = NOT_TENURED);
   MUST_USE_RESULT AllocationResult AllocateSmallOrderedHashMap(
       int length, PretenureFlag pretenure = NOT_TENURED);
 
   // Allocate an uninitialized object.  The memory is non-executable if the
   // hardware and OS allow.  This is the single choke-point for allocations
   // performed by the runtime and should not be bypassed (to extend this to
   // inlined allocations, use the Heap::DisableInlineAllocation() support).
@@ skipping 638 matching lines @@
   friend class PagedSpace;
   DISALLOW_COPY_AND_ASSIGN(AllocationObserver);
 };
 
 V8_EXPORT_PRIVATE const char* AllocationSpaceName(AllocationSpace space);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_