Update to Chrome 32.0.1700.77

This is the latest stable release.
Remove gsutil repository override

This isn't needed in Chrome 32.
Spew less when reverting changes fails
Spew less when script/bootstrap's subcommands fail
Make sure depot_tools is in PATH before running gclient

Some hooks assume it is in PATH.
Update WebKit patches for Chrome 32
Update v8_debug.patch for Chrome 32
Update for shuffling of content gyp files in Chrome 32
Update for macro rename in angle_dx11 in Chrome 32

See https://codereview.appspot.com/14294046
Export symbols from ui/events

See https://codereview.chromium.org/24788002
Export symbols from ui/gfx

See https://codereview.chromium.org/25015003
Export ui/aura symbols

Aura is now enabled on Windows. See
https://codereview.chromium.org/24164002
Always export symbols from ui/compositor

They're needed by Aura-related code in content/
Export symbols from Blink's platform/ directory

See https://codereview.chromium.org/24774002
Update for BLINK_IMPLEMENTATION rename in Chrome 32

See https://codereview.chromium.org/24515002
Add a missing #include to AudioDSPKernelProcessor.h

Otherwise we get this error:

FAILED: ninja -t msvc -e environment.x86 -- "D:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\win_toolchain\VC\bin\cl.exe" /nologo /showIncludes /FC @obj\third_party\WebKit\Source\core\gen\blink\bindings\webcore_derived.V8DerivedSources08.obj.rsp /c gen\blink\bindings\V8DerivedSources08.cpp /Foobj\third_party\WebKit\Source\core\gen\blink\bindings\webcore_derived.V8DerivedSources08.obj /Fdobj\third_party\WebKit\Source\core\webcore_derived.pdb
d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\ownptrcommon.h(51) : error C2027: use of undefined type 'WebCore::AudioDSPKernel'
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\platform\audio\audiodspkernelprocessor.h(44) : see declaration of 'WebCore::AudioDSPKernel'
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\ownptrcommon.h(49) : while compiling class template member function 'void WTF::OwnedPtrDeleter<T>::deletePtr(T *)'
        with
        [
            T=WebCore::AudioDSPKernel
        ]
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\ownptr.h(62) : see reference to class template instantiation 'WTF::OwnedPtrDeleter<T>' being compiled
        with
        [
            T=WebCore::AudioDSPKernel
        ]
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\ownptr.h(61) : while compiling class template member function 'WTF::OwnPtr<T>::~OwnPtr(void)'
        with
        [
            T=WebCore::AudioDSPKernel
        ]
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\vector.h(332) : see reference to class template instantiation 'WTF::OwnPtr<T>' being compiled
        with
        [
            T=WebCore::AudioDSPKernel
        ]
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\vector.h(330) : while compiling class template member function 'void WTF::VectorBuffer<T,inlineCapacity>::deallocateBuffer(T *)'
        with
        [
            T=WTF::OwnPtr<WebCore::AudioDSPKernel>,
            inlineCapacity=0
        ]
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\vector.h(457) : see reference to class template instantiation 'WTF::VectorBuffer<T,inlineCapacity>' being compiled
        with
        [
            T=WTF::OwnPtr<WebCore::AudioDSPKernel>,
            inlineCapacity=0
        ]
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\platform\audio\audiodspkernelprocessor.h(72) : see reference to class template instantiation 'WTF::Vector<T>' being compiled
        with
        [
            T=WTF::OwnPtr<WebCore::AudioDSPKernel>
        ]
d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\ownptrcommon.h(51) : error C2118: negative subscript
d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\wtf\ownptrcommon.h(52) : warning C4150: deletion of pointer to incomplete type 'WebCore::AudioDSPKernel'; no destructor called
        d:\jenkins\workspace\libchromiumcontent-win-e87a9670d1e0\vendor\chromium\src\third_party\webkit\source\platform\audio\audiodspkernelprocessor.h(44) : see declaration of 'WebCore::AudioDSPKernel'
Fix circular #includes in WebKit/Source/platform/audio
Pull in the definition of PLATFORM_EXPORT too
Compositor is part of the main DLL now
Add patch to allow restarting of renderer process on purpose.